title: How to pass data to CActiveForm
body: <p>I have a form with dropDownList
  I need to pass the data from DB to that list. </p>
  
  <pre><code>$form-&gt;dropDownList($model,'parent',$dd_data); ?&gt;   
  </code></pre>
  
  <p>Where and how should I define $dd_data array? </p>