yiisoft/yii2 — pull request #756 by callmez (2013-08-14 02:16:12+00:00)
Title: Make DropDown support divider class.

```php
Dropdown::widget(array(
'items' => array(
array('label' => 'li1', 'url' => $this->context->createUrl('site/index')),
array('label' => '', 'options' => array('class' => 'divider')),
array('label' => 'li3', 'url' => $this->context->createUrl('site/index')),
)
)
```