dropdown select value in yii - php

Question

I am currently trying to create a sample shopping site,The problem came when I created a search page.In my search page I Have two fields one for enter the keyword and other for select type of item
Which means search,keyword in the selected item.but the item defined in DB is 0 and 1 and i Trying to get it my code but fails...could any one help me...
The Gfunction code is
public static function item(){
$optionList='';
$CategoryList = OfferEvents::model()->findAllByAttributes(array());
foreach($CategoryList as $catdata)
{ $optionList.="<option value='".$catdata['type']."'>".$catdata['name']."</option>"; }
return $optionList;
}
and view code is
<form action="<?php echo Yii::app()->baseUrl; ?>/offer?>" method="GET" class="form-inline form-section-2 row fadeInDown animated">
<div class="col-sm-5 form-group">
<input type="text" name="search" class="form-control" id="search" value="" placeholder="Enter Your Keyword">
</div>
<div class="col-sm-4 form-group">
<select name="cat" class="form-control selectpicker">
<option value='0'>Select type</option>
<?php echo GFunctions::item(); ?>
</select>
</div>
<div class="col-sm-3 form-group">
<button type="submit" class="btn btn-default btn-new">Search</button>
</div>
</form>

Answer 1

why don't you use Yii built in functions to handle the dropdown?
I am not sure how your Models looks like but you can choose one of the following functions to achieve what you want instead of trying to return a String $optionList with HTML tags.
CHtml::activeDropDownList() // for directly bind to active record model
CHtml::dropDownList()

Answer 2

Try this code....
Function
public static function item(){
$CategoryList = OfferEvents::model()->findAllByAttributes(array());
$optionList = CHtml::listData($countries, 'type', 'name')
return $optionList;
}
In view
<?php echo CHtml::dropDownList('cat', '', GFunctions::item(), array('prompt'=>'Select type'));?>