if click default button address should be default - codeigniter

Question

One user multiple shipping address how to make it as default,if click the make as default button,that address should be default and remaining all address shown the make as default button in a particular address box,except default address box.
view page
<?php foreach ($buyer_Address as $row) { ?>
<div class="col-md-4">
<div class="panel panel-default add_min_height">
<div class="panel-heading">Default:</div>
<input type="hidden" name="de" id="de" value="<?php echo $row->b_id; ?>">
<div class="panel-body">
<address><?php echo $row->b_fullname; ?><br>
<?php echo $row->b_street_address; ?>,<?php echo $row->b_locality ?>,<br>
<?php echo $row->b_landmark; ?>,
<?php echo $row->b_city; ?>, <?php echo $row->b_state; ?>,<?php echo $row->b_pincode; ?>
India
Phone number: <?php echo $row->b_mobile_number; ?></address>
</div>
<div class="panel-footer">
<a href="<?php echo base_url(); ?>index.php/welcome/buyereditaddress?id=<?php echo $row->b_id; ?>" >Edit</a>
<i class="fa fa-ellipsis-v"></i>
Delete
<i class="fa fa-ellipsis-v"></i>
<?php if ($row->status == '0') { ?>
<button type="submit" style="color:#337ab7;background: none !important;border: none;" name="default" id="default">Make as deafault</button>
<?php } ?>
</div>
</div>
</div>
<?php } ?>
controller
public function defaultAddress() {
$id = $this->input->post('de');
$this->BuyerProfile_Model->defaultAddress($id);
redirect('welcome/buyeraddresses');
}
model
function defaultAddress($id) {
$this->db->trans_start();
$this->db->query("UPDATE buyer_order_address SET status = '0' WHERE b_id = '$id'");
$this->db->query("UPDATE buyer_order_address SET status = '1' WHERE b_id = '$id'");
$this->db->trans_complete();
}