[SloProKiller]

pawn Код:

{
new aText[128],aName[MAX_PLAYER_NAME],string[128];
if(pInfo[playerid][pAdmin] < 1) { SendClientMessage(playerid,COLOR_LIGHTYELLOW,"You are not an Administrator with the required level."); return 1; }
if(!sscanf(params,"s",aText)) { SendClientMessage(playerid,COLOR_LIGHTYELLOW,"[USAGE] ''/a [text]''."); return 1; }

GetPlayerName(playerid,aName,sizeof(aName));
format(string,sizeof(string),"[AdminChat]%s: %s",aName,aText);

for(new i=0;i<=MAX_PLAYERS;i++)
{
 if(pInfo[i][pAdmin] > 0)
   SendClientMessage(i,COLOR_LIGHTBLUE,string);
}
return 1;
}

Should work, but I wrote it off my mind.