generate XML on the fly-sub categories

[dflow]

i have a product and it's image gallery

how do i create the image gallery as a subcategory in the xml output?

<?php
$hostname_conn = "localhost";
$database_conn = "international";
$username_conn = "root";
$password_conn = "root";
$conn = mysql_pconnect($hostname_conn, $username_conn, $password_conn) or trigger_error(mysql_error(),E_USER_ERROR); 
?>
<?php
// Query the database and get all the records from the Images table 
mysql_select_db($database_conn, $conn);
$query_rsAll = "SELECT *
FROM `apartments`
LEFT JOIN city_list ON apartments . city_id = city_list . cityid
LEFT JOIN images ON apartments . id = images . id
WHERE apartments . city_id = 1 ";
$rsAll = mysql_query($query_rsAll, $conn) or die(mysql_error());
$row_rsAll = mysql_fetch_assoc($rsAll);
$totalRows_rsAll = mysql_num_rows($rsAll);

// Send the headers
header('Content-type: text/xml');
header('Pragma: public');        
header('Cache-control: private');
header('Expires: -1');
?><?php echo('<?xml version="1.0" encoding="utf-8"?>'); ?>
<root>
  <?php if ($totalRows_rsAll > 0) { // Show if recordset not empty ?>
  <?php do { ?>
<row>
	<?php foreach ($row_rsAll as $column=>$value) { ?>
	<<?php echo $column; ?>><![CDATA[<?php echo $row_rsAll[$column]; ?>]]></<?php echo $column; ?>>
	<?php } ?>
</row>
    <?php } while ($row_rsAll = mysql_fetch_assoc($rsAll)); ?>
<?php } // Show if recordset not empty ?>
</root>
<?php
mysql_free_result($rsAll);
?>