public function actionRegions()
{
$country_id = Yii::app()->request->getQuery('country_id', 0);
$regions = BglGeoRegion::model()->findAllByAttributes(array('countryid' => $country_id));
print json_encode(CHtml::listData($regions, 'id', 'name'));
Yii::app()->end();
}
<div class="reg-field data-header">
<label>Страна <span>*</span></label>
<div class="select-wrap">
<?php
echo $form->dropDownList($model, "country_id", CHtml::listData(BglGeoCountry::model()->findAll('id=3159'), 'id', 'name'));
?>
<?php
echo $form->error($model, "country_id");
?>
</div>
</div>
<div class="reg-field data-header">
<label>Область</label>
<div class="select-wrap">
<?php
echo $form->dropDownList($model, "region_id", array('' => '') + CHtml::listData(BglGeoRegion::model()->findAll('countryid=3159'), 'id', 'name'));
?>
<?php
echo $form->error($model, "region_id");
?>
</div>
</div>
<div class="reg-field data-header">
<label>Город</label>
<div class="select-wrap">
<?php
echo $form->dropDownList($model, "city_id", array());
?>
<?php
echo $form->error($model, "city_id");
?>
