Custom Autocomplete Display and Value Submission Follow @yiiframework

class myAutoComplete extends CJuiAutoComplete
{
    /**
     * @var string the chain of method calls that would be appended at the end of the autocomplete constructor.
     * For example, ".result(function(...){})" would cause the specified js function to execute
     * when the user selects an option.
     */
    public $methodChain;
    /**
     * Run this widget.
     * This method registers necessary javascript and renders the needed HTML code.
     */
    public function run()
    {
        list($name,$id)=$this->resolveNameID();
 
        if(isset($this->htmlOptions['id']))
            $id=$this->htmlOptions['id'];
        else
            $this->htmlOptions['id']=$id;
 
        if(isset($this->htmlOptions['name']))
            $name=$this->htmlOptions['name'];
 
        if($this->hasModel())
            echo CHtml::activeTextField($this->model,$this->attribute,$this->htmlOptions);
        else
            echo CHtml::textField($name,$this->value,$this->htmlOptions);
 
        if($this->sourceUrl!==null)
            $this->options['source']=CHtml::normalizeUrl($this->sourceUrl);
        else
            $this->options['source']=$this->source;
 
        $options=CJavaScript::encode($this->options);
 
        $js = "jQuery('#{$id}').autocomplete($options){$this->methodChain};";
 
        $cs = Yii::app()->getClientScript();
        $cs->registerScript(__CLASS__.'#'.$id, $js);
    }
}

// This function will echo a JSON object 
// of this format:
// [{id:id, name: 'name'}]
public function actionAutocomplete(){
      $res = array();
      $term = Yii::app()->getRequest()->getParam('term', false);
      if ($term)
      {
         // test table is for the sake of this example
         $sql = 'SELECT id, name FROM {{test}} where LCASE(name) LIKE :name';
         $cmd = Yii::app()->db->createCommand($sql);
         $cmd->bindValue(":name","%".strtolower($term)."%", PDO::PARAM_STR);
         $res = $cmd->queryAll();
      }
      echo CJSON::encode($res);
      Yii::app()->end();
}

// REMEMBER, we have a hidden 
// input HTML element with model's attribute_id
<?php echo $form->hiddenField($model, 'attribute_id'); ?>
<?php
// ext is a shortcut for application.extensions
$this->widget('ext.myAutoComplete', array(
    'name' => 'test_autocomplete',
    'source' => $this->createUrl('test/autocomplete'),
// attribute_value is a custom property that returns the 
// name of our related object -ie return $model->related_model->name
    'value' => $model->isNewRecord ? '': $model->attribute_value,
    'options' => array(
        'minLength'=>3,
        'autoFill'=>false,
        'focus'=> 'js:function( event, ui ) {
            $( "#test_autocomplete" ).val( ui.item.name );
            return false;
        }',
        'select'=>'js:function( event, ui ) {
            $("#'.CHtml::activeId($model,'attribute_id').'")
            .val(ui.item.id);
            return false;
        }'
     ),
    'htmlOptions'=>array('class'=>'input-1', 'autocomplete'=>'off'),
    'methodChain'=>'.data( "autocomplete" )._renderItem = function( ul, item ) {
        return $( "<li></li>" )
            .data( "item.autocomplete", item )
            .append( "<a>" + item.name +  "</a>" )
            .appendTo( ul );
    };'
));
?>