protected function ajaxExecute(MUser $me, MShop $shop)
 {
     $cid = MRequest::request('cid');
     try {
         $shop->deleteCategory($cid);
     } catch (Exception $e) {
         if (in_array($e->getCode(), array(ERR_CATEGORY_NOT_EXIST))) {
             return MJsonRespond::respondFail($e->getMessage());
         }
         return MJsonRespond::respondFail('删除失败');
     }
     return MJsonRespond::respondSuccess('成功');
 }