[Wilczek]

Open basechat.sp, somewhere around line 324:

PHP Code:

SendChatToAll(client, const String:message[])
{
    new String:nameBuf[MAX_NAME_LENGTH];
    
    for (new i = 1; i <= MaxClients; i++)
    {
        if (!IsClientInGame(i) || IsFakeClient(i))
        {
            continue;
        }
        FormatActivitySource(client, i, nameBuf, sizeof(nameBuf));
        
        PrintToChat(i, "\x01 \x07(Admin) \x06%s: %s", nameBuf, message);
    }
}