/**
  * 删除菜单
  * 
  * @return type 
  */
 public function deletemenuAction()
 {
     $request = $this->getRequest();
     $menu_id = (int) $request->getParam('menu_id');
     $csrf_token = $request->getParam('csrf_token');
     if (AdminService::checkCsrfToke($csrf_token) == false) {
         return $this->showWarning('非法操作');
     }
     $admin_service = new AdminService();
     $menu_info = $admin_service->getMenuById($menu_id);
     if (empty($menu_info)) {
         return $this->showWarning('对不起,菜单不存在。', '/system/menumanage');
     }
     $rs = $admin_service->deleteMenu($menu_id);
     if ($rs) {
         return $this->showMessage('恭喜您,删除成功。', '/system/menumanage');
     } else {
         return $this->showWarning('很遗憾,删除失败。', '/system/menumanage');
     }
 }