diff --git a/vendor/blobt/widgets/Menu.php b/vendor/blobt/widgets/Menu.php
index 6a362b4..13e2dfa 100644
--- a/vendor/blobt/widgets/Menu.php
+++ b/vendor/blobt/widgets/Menu.php
@@ -186,13 +186,14 @@ class Menu extends Widget {
      */
     protected function renderItems($items) {
         $lines = [];
+        $n = count($items);
         foreach ($items as $i => $item) {
             /* 获取菜单项的自定义属性 */
             $options = array_merge($this->itemOptions, ArrayHelper::getValue($item, 'options', []));
             $tag = ArrayHelper::remove($options, 'tag', 'li');
             $class = [];
 
-            if ($item['active']) {
+            if (isset($item['active'])) {
                 $class[] = $this->activeCssClass;
                 if (isset($item['items'])) {
                     $class[] = $this->menuOpenClass;