new Text:Classtextdraw[27], Text:SkinTextdraw[20];
//
public OnPlayerClickTextDraw(playerid,Text:clickedid)
{
    if(clickedid == Classtextdraw[2])//trucker
    {
        PlayerInfo[playerid][pClass] = CLASS_TRUCKER;
        SetPlayerPos(playerid,2149.2168,-2267.5007,14.4545);
        SetPlayerCameraPos(playerid,2149.2168,-2267.5007,14.4545);
        SetPlayerCameraLookAt(playerid,2161.4399,-2257.0442,13.3009);
    }
    //....
             for(new i = 0; i < 27; i++) TextDrawHideForPlayer(playerid,Classtextdraw[i]);
    CallSpawn(playerid);
}
//

public CallSpawn(playerid)
{
    if(PlayerInfo[playerid][pClass] == CLASS_TRUCKER)
    {
        for(new i = 0; i < 20; i++) TextDrawShowForPlayer(playerid,SkinTextdraw[i]); 
        SetPlayerColor(playerid, COLOR_TRUCKER);
    }
    //...
}

CMD:test(playerid,params[])
{
    //These are able to show:
    TextDrawShowForPlayer(playerid,SkinTextdraw[0]);
    TextDrawShowForPlayer(playerid,SkinTextdraw[1]);
    TextDrawShowForPlayer(playerid,SkinTextdraw[2]);
    TextDrawShowForPlayer(playerid,SkinTextdraw[3]);
    TextDrawShowForPlayer(playerid,SkinTextdraw[4]);
    TextDrawShowForPlayer(playerid,SkinTextdraw[5]);
    //These aren't:
    TextDrawShowForPlayer(playerid,SkinTextdraw[6]);
    TextDrawShowForPlayer(playerid,SkinTextdraw[7]);
    TextDrawShowForPlayer(playerid,SkinTextdraw[8]);
    TextDrawShowForPlayer(playerid,SkinTextdraw[9]);
    TextDrawShowForPlayer(playerid,SkinTextdraw[10]);
    //.. till SkinTextdraw[19]
    return 1;
}