/**
  * @brief delMeta 删除 Meta
  *
  * @return void
  */
 public function delMeta()
 {
     $mid = Request::P('mid');
     $meta = new MetaLibrary();
     if ($meta->delMeta($mid)) {
         $r = array('success' => TRUE, 'message' => _t('Delete Meta complete.'));
     } else {
         $r = array('success' => FALSE, 'message' => _t('Delete Meta failed.'));
     }
     Response::ajaxReturn($r);
 }