public static function init_mem($action, $data)
 {
     $action_arr = self::get_action_lang();
     $action_str = $action_arr[$action];
     if (!$action_str) {
         return false;
     }
     if (is_array($data)) {
         self::$_mem = strtr($action_str, $data);
     } else {
         self::$_mem = $data;
     }
 }