管理员管理优化

@@ -167,7 +167,7 @@ class Category extends Backend
         //自定义搜索条件
         $custom = (array)$this->request->request("custom/a");
         //是否返回树形结构
-        $istree = $this->request->request("isTree", 0);
+        $istree = $this->request->request("isTree", 1);
         $ishtml = $this->request->request("isHtml", 0);
         if ($istree) {
             $word = [];