Data in Drop Down List Retrieve From DB in Codeigniter

In creating dropdown in my project encounters problems(errors). I'm very new to codeigniter.

Please check and advise what is wrong with with my code?

Model

Public function get_region()
{
    $return = array();
    $query  = $this->db->get('region')->result_array();
    if( is_array( $query ) && count( $query ) > 0 ){
    $return[''] = 'please select';
    foreach($query as $row)
    {
        $return[$row['id']] = $row['r_e_name'];
    }
}

Controller

public function index()
{
    $this->load->model('country_model');
    $data['countries'] = $this->country_model->get(false);
    $data['page_title']  = "Countries"; 
    $data['return']=$this->country_model->get_region();
    $this->template->show('countries', $data);
}

View

<tr>
    <td>
        <?php echo form_label('Region Name *', 'r_e_name'); ?>
    </td>
    <td>
        <?php echo form_dropdown('r_e_name', $return);?>
    </td>
</tr>

Errors

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: return

Filename: views/countries_add.php

Line Number: 17

---

A PHP Error was encountered

Severity: Warning

Message: Invalid argument supplied for foreach()

Filename: helpers/form_helper.php

Line Number: 331

Model

function get_country() {
    $return[''] = 'please select';
    $this->db->order_by('c_e_name', 'asc'); 
    $query = $this->db->get('country'); 
    foreach($query->result_array() as $row){
        $return[$row['id']] = $row['c_e_name'];
    }
    return $return;
}

function get_region(){
    $return[''] = 'please select';
    $query  = $this->db->get('region');
    foreach($query->result_array() as $row){
        $return[$row['id']] = $row['r_e_name'];
    }
    return $return;
}

Controller

public function index()
{
    $this->load->model('country_model');
    $data['country'] = $this->country_model->get_country();
    $data['region']  = $this->country_model->get_region();
    $data['page_title']  = "Countries";
    $this->template->show('countries', $data);
}

View

<tr>
    <td><?php echo form_label('Country *', 'c_e_name'); ?></td>
    <td><?php echo form_dropdown('c_e_name', $country);?></td>
</tr>
<tr>
    <td><?php echo form_label('Region Name *', 'r_e_name'); ?></td>
    <td><?php echo form_dropdown('r_e_name', $region);?></td>
</tr>