Get wordpress menu builder items to display on a different domain WordPress

Hai Bui answers:

I found an answer for your question in this article http://drewsbox.com/wordpress/wordpress-menu-feeds

Put this in functions.php (please change the parameters for wp_nav_menu)

<?php

if ($_SERVER['REQUEST_URI'] == '/menufeed/main')
{
// Set the content-type to server javascript code
header("Content-type:text/javascript");
$expires = 60*30; // seconds * minutes (30 minute cache)
header("Pragma: public");
header("Cache-Control: maxage=".$expires);
header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$expires) . ' GMT');
$menu = wp_nav_menu(array(
'theme_location' => 'main_menu'
'menu_id' => 'main_menu',
'container' => 'none',
'echo' => 0
));

// Remove newlines and tabs (for more reliable javascript)
// Also escape quotes with addslashes
echo 'document.write("' . addslashes(preg_replace(array('/\n/', '/\t/'), "", $menu)) . '");';
die;
}

?>

Then on the other site/domain, just add the javascript to print the menu.
<script type="text/javascript" src="http://example.com/menufeed/main"></script>