Fixes #5570: `yii\bootstrap\Tabs` would throw an exception if `content` is not set for one of its `items` Fixes #5572.

CHANGELOG.md

@@ -4,7 +4,7 @@ Yii Framework 2 bootstrap extension Change Log
 2.0.1 under development
 -----------------------
 
-- no changes in this release.
+- Bug #5570: `yii\bootstrap\Tabs` would throw an exception if `content` is not set for one of its `items` (RomeroMsk)
 
 
 2.0.0 October 12, 2014

Tabs.php

@@ -156,7 +156,7 @@ class Tabs extends Widget
                 $linkOptions['data-toggle'] = 'dropdown';
                 $header = Html::a($label, "#", $linkOptions) . "\n"
                     . Dropdown::widget(['items' => $item['items'], 'clientOptions' => false, 'view' => $this->getView()]);
-            } elseif (isset($item['content'])) {
+            } else {
                 $options = array_merge($this->itemOptions, ArrayHelper::getValue($item, 'options', []));
                 $options['id'] = ArrayHelper::getValue($options, 'id', $this->options['id'] . '-tab' . $n);
 
@@ -167,7 +167,7 @@ class Tabs extends Widget
                 }
                 $linkOptions['data-toggle'] = 'tab';
                 $header = Html::a($label, '#' . $options['id'], $linkOptions);
-                $panes[] = Html::tag('div', $item['content'], $options);
+                $panes[] = Html::tag('div', isset($item['content']) ? $item['content'] : '', $options);
             }
 
             $headers[] = Html::tag('li', $header, $headerOptions);