Searchable dropdown

Hi I am a yii bie and I just stuck in a problem, I Implemented searchable drop down list, But my problem is when I start typing in the searchable drop down field, values from database comes into dropdown list, so if I type something which is not in the drop down list, I get "no results found" which is correct. But my typed value gone as soon as left the drop-down.


  <?php

    

  $this->widget('ext.select2.ESelect2',array(

  'name'=>'BusinessItems[business_id]',

  'data'=>CHtml::listData(Business::model()->findAll(), 'id', 'business_name'), //the whole available list

  'htmlOptions'=>array(

       'placeholder'=>' search Business name?',

    //'options'=>$options, //the selected values

    //'multiple'=>'multiple',

    'style'=>'width:530px',

  ),

  ));

    ?>

So how can i retain the value which i typed in the field??? Actually my case is if no results found the typed should remain in the drop down field.