public OnPlayerCommandText(playerid, cmdtext[])
{
    if (strcmp("/rpguide", cmdtext, true, 10) == 0)
    {
        ShowPlayerDialog(playerid, RPGUIDE, DIALOG_STYLE_LIST, "Roleplay Guide","In Character\nOut Of Character\nPowergaming\nMetagaming\nRevengeKill\nCharacter Kill\nChicken Running\nDeathmatch\nKill on Sight\nBunny hop\nPlayer Kill","Choose","Close");
        return 1;
    }
    return 0;
}

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    if(dialogid == RPGUIDE)
    {
        if(response)
        {
            if(listitem == 0)
            {
                ShowPlayerDialog(playerid, HELP1, DIALOG_STYLE_MSGBOX, "In Character (IC)","Acting as a player as you would in real life\nExample: None needed.","Okey","Close");
            }
            if(listitem == 1)
            {
                ShowPlayerDialog(playerid, HELP2, DIALOG_STYLE_MSGBOX, "Out Of Character (OOC)","Making comments or asking questions that are not part of the scene or not being said as your character\nExample: I need to take a piss, ill brb.","Okey","Close");
            }
            if(listitem == 2)
            {
                ShowPlayerDialog(playerid, HELP3, DIALOG_STYLE_MSGBOX, "Powergaming (PG)","Forcing actions upon a player against someones free will\nExample:\nPlayer1: Get in my car!\nPlayer2: On one condition...\nPlayer1: No get in!\nPlayer1 grabs Player2 and forces him into the car\n \n Must always use /me and /do's for an action that they can avoid.","Okey","close");
            }
            if(listitem == 3)
            {
                ShowPlayerDialog(playerid, HELP4, DIALOG_STYLE_MSGBOX, "Metagaming (MG)","Using OOC Information IC.\nExample: Telling people where someone is when you dont know where they are IC, but you do OOCly.","Okey","Close");
            }
            if(listitem == 4)
            {
                ShowPlayerDialog(playerid, HELP5, DIALOG_STYLE_MSGBOX, "RevengeKill (RK)","If you get killed by someone, You go back to the same spot, and kill the person again\nBut when you die, you loose 30 minutes of your memory\nExample: No example needed","Okey","Close");
            }
            if(listitem == 5)
            {
                ShowPlayerDialog(playerid, HELP6, DIALOG_STYLE_MSGBOX, "Character Kill (CK)","Both players must agree to a Character Kill\nThis is when you Permanently kill a player and they lose all there items and restart a new player\nExample: None needed.","Okey","Close");
            }
            if(listitem == 6)
            {
                ShowPlayerDialog(playerid, HELP7, DIALOG_STYLE_MSGBOX, "Chicken Running (CR)","This is when you run in Zig-Zag lines to avoid being shot at by another player\nExample: Running away in zig-zag lines when getting shot at in a gang war.","Okey","Close");
            }
            if(listitem == 7)
            {
                ShowPlayerDialog(playerid, HELP8, DIALOG_STYLE_MSGBOX, "Deathmatch (DM)","Killing someone for no reason at all\nExample: None needed.","Okey","Close");
            }
            if(listitem == 8)
            {
                ShowPlayerDialog(playerid, HELP9, DIALOG_STYLE_MSGBOX, "Kill on Sight (KoS)","Killing someone when you first spot someone\nExample: Killing someone when they first spawn, or when you just see him come out of somewhere.","Okey","Close");
            }
            if(listitem == 9)
            {
                ShowPlayerDialog(playerid, HELP10, DIALOG_STYLE_MSGBOX, "Bunny Hopping (BH)","Jumping around constantly, it's also considered non RP because it's not possible in real life.\nExample: You need to hurry and you jump over and over again until you reach the place you wanna go.","Okey","Close");
            }
            if(listitem == 10)
            {
                ShowPlayerDialog(playerid, HELP11, DIALOG_STYLE_MSGBOX, "Player Kill (PK)","When your character dies from a certain situation, you can come and RP with the same people but you will not remember what happened on your death.\nExample: None Needed.","Okey","Close");
            }
            if(listitem == 11)
            {
                ShowPlayerDialog(playerid, HELP12, DIALOG_STYLE_MSGBOX, "Spawn Kill (SK)","Killing someone when they first spawn. (which on most rp servers, is the hospital).\n Example: Someone spawns at hospital and you kill them for no reason.","Okey","Close");
            }
        }
    }
}

else if(dialogid == HELP1) { if(response) { ShowPlayerDialog(playerid, ....); // Your original /RPGuide ShowPlayerDialog. } }

public OnPlayerCommandText(playerid, cmdtext[])
{
    if (strcmp("/rpguide", cmdtext, true, 10) == 0)
    {
        ShowPlayerDialog(playerid, RPGUIDE, DIALOG_STYLE_LIST, "Roleplay Guide","In Character\nOut Of Character\nPowergaming\nMetagaming\nRevengeKill\nCharacter Kill\nChicken Running\nDeathmatch\nKill on Sight\nBunny hop\nPlayer Kill","Choose","Close");
        return 1;
    }
    return 0;
}

//at the top of ur script
#define MENU 5641 //just choose some define that is not used


public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    if(dialogid == RPGUIDE)
    {
        if(response)
        {
            if(listitem == 0)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "In Character (IC)","Acting as a player as you would in real life\nExample: None needed.","Okey","Close");
            }
            if(listitem == 1)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Out Of Character (OOC)","Making comments or asking questions that are not part of the scene or not being said as your character\nExample: I need to take a piss, ill brb.","Okey","Back");
            }
            if(listitem == 2)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Powergaming (PG)","Forcing actions upon a player against someones free will\nExample:\nPlayer1: Get in my car!\nPlayer2: On one condition...\nPlayer1: No get in!\nPlayer1 grabs Player2 and forces him into the car\n \n Must always use /me and /do's for an action that they can avoid.","Okey","Back");
            }
            if(listitem == 3)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Metagaming (MG)","Using OOC Information IC.\nExample: Telling people where someone is when you dont know where they are IC, but you do OOCly.","Okey","Back");
            }
            if(listitem == 4)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "RevengeKill (RK)","If you get killed by someone, You go back to the same spot, and kill the person again\nBut when you die, you loose 30 minutes of your memory\nExample: No example needed","Okey","Back");
            }
            if(listitem == 5)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Character Kill (CK)","Both players must agree to a Character Kill\nThis is when you Permanently kill a player and they lose all there items and restart a new player\nExample: None needed.","Okey","Back");
            }
            if(listitem == 6)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Chicken Running (CR)","This is when you run in Zig-Zag lines to avoid being shot at by another player\nExample: Running away in zig-zag lines when getting shot at in a gang war.","Okey","Back");
            }
            if(listitem == 7)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Deathmatch (DM)","Killing someone for no reason at all\nExample: None needed.","Okey","Back");
            }
            if(listitem == 8)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Kill on Sight (KoS)","Killing someone when you first spot someone\nExample: Killing someone when they first spawn, or when you just see him come out of somewhere.","Okey","Back");
            }
            if(listitem == 9)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Bunny Hopping (BH)","Jumping around constantly, it's also considered non RP because it's not possible in real life.\nExample: You need to hurry and you jump over and over again until you reach the place you wanna go.","Okey","Back");
            }
            if(listitem == 10)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Player Kill (PK)","When your character dies from a certain situation, you can come and RP with the same people but you will not remember what happened on your death.\nExample: None Needed.","Okey","Back");
            }
            if(listitem == 11)
            {
                ShowPlayerDialog(playerid, MENU, DIALOG_STYLE_MSGBOX, "Spawn Kill (SK)","Killing someone when they first spawn. (which on most rp servers, is the hospital).\n Example: Someone spawns at hospital and you kill them for no reason.","Okey","Back");
            }
        }
    }
if(dialogid == MENU)
    {
        if(!response)
        {
        ShowPlayerDialog(playerid, RPGUIDE, DIALOG_STYLE_LIST, "Roleplay Guide","In Character\nOut Of Character\nPowergaming\nMetagaming\nRevengeKill\nCharacter Kill\nChicken Running\nDeathmatch\nKill on Sight\nBunny hop\nPlayer Kill","Choose","Close");
        }
    }
}