Phalcon Dependent dropdown

I am totally new to using phalcon i want to create dependent dropdown in phalcon. I have tried following code tbl_personaldetails/edit.phtml

<tr>
    <td align="left">
        <label for="country">Country</label>
    </td>
    <td align="left">
        <?php  echo $this->tag->select(array("country",
                                TblCountry::find("is_active = 1"),
                                "useEmpty"  =>  true,
                                "emptyText" =>  "Please select",
                                "using" => array("country_id", "country_name"),
                                ));
        ?>
    </td>
</tr>
<tr>
    <td align="left">
        <label for="state">State</label>
    </td>

    <td align="left">
        <?php  echo $this->tag->select(array("state",
                                TblState::find("is_active = 1"),
                                "useEmpty"  =>  true,
                                "emptyText" =>  "Please select",
                                "using" => array("state_id", "state_name")
                                ));
        ?>
    </td>
</tr>

Javascript code

<script type="text/javascript">
    $(document).ready(function()
    {
        $("#country").change(function()
        {
            var value = $(this).val();
            var url = 'https://'+'<?php echo $_SERVER['HTTP_HOST']?>'+'/test/tbl_personaldetails/stateDependant';
            $.ajax({
                type: 'POST',
                //dataType:'json',  //if i uncomment this didn't get reply
                url: url,
                data:{country_id:value}
            })
                .done(function( msg ) {
                    alert( "Data Saved: " + msg );
                });
        });
    });
</script>

controller action

public function stateDependantAction()
{
    $country_id = $_REQUEST['country_id'];
    if($country_id!='')
    {
        $country_id=$_REQUEST['country_id'];
    }
    else
    {
        $country_id=" ";
    }

    $data = TblState::find(array("is_active = 1","country_id = ".$country_id));

    foreach ($data as $result) {
        $resData[] = array("id"=>$result->state_id, "name"=>$result->state_name);
    }
    print_r($resData);exit; //getting this after commenting dataType:"JSON"
    echo json_encode(array('error'=>'false','state'=>$resData));
}

How can i get response on view page and pass it to state drop-down please suggest me a way Thanks in advance