如何获取所选选项的名称并将其发送到其他PHP脚本？

This is my jQuery code

<script>
$(document).ready(function() {
   $('#countries').change(function(){
      $('#countriesForm').submit();
   });
});
</script>

and my php code looks like this

<form action="<?php echo $this->createUrl($this->id."/".$this->action->id); ?>" id="countriesForm" method='POST'>
<?php echo CHtml::dropDownList('countries', $select = array(),
 CHtml::listData($countries, 'code', 'name'));
?>
<form>
<div class='description'></div>

Can someone pls help me how to get echo/print name or code of the selected country into the div .description. And how to send the selected code to other php script.

It can be like

<div class='description'><?php
if( isset($_POST['countries']) ) {
    echo CHtml::encode($_POST['countries']);
}
?></div>

<?php
    $controller = Yii::app()->controller->id;
    $action =  Yii::app()->controller->action->id;
?>

Using this, you get the controller and action performed.

<li <?php 
    if ($controller=="site"&&$action=="index"){
        echo 'class="active"'; } ?> >
    <?php echo CHtml::link('Home',array('site/index')); ?>
</li>