[Rachael]

I edited my post above.

Something like this ( untested ) might work.

pawn Код:

stock FormatColors( string[] )
{
    new 
        pos,
        sub[164]
    ;
    format( sub , sizeof(sub) , "%s" , string );
    pos = strfind( sub , "[g]" , true );
    while( pos != -1 )
    {
        strdel( sub , pos , pos + 3 , sizeof(sub) );
        strins( sub , "~g~" , pos );
        pos = strfind( sub , "[g]" , true );
    }
    pos = strfind( sub , "[r]" , true );
    while( pos != -1 )
    {
        strdel( sub , pos , pos + 3 , sizeof(sub) );
        strins( sub , "~r~" , pos );
        pos = strfind( sub , "[r]" , true );
    }       
    return sub;
}

Obviously you would have to add all the symbols yo wanted to allow.