title: how can i add class to errorsummay without remove header message
body: <p>I'm trying to add a css class to the errorSummary() in yii framwork but after add class i have not header error default<br>
  how can i add class to errorsummay without remove header message</p>
  
  <pre><code>&lt;?php echo  $form-&gt;errorSummary($model, '', '', array('class' =&gt; 'alert alert-error')); ?&gt;
  </code></pre>