echo wp_nav_menu order

How do i pass the order of items in a wp_nav_menu? I would like to pass this array to a sidebar menu that uses a plugin, namely WP-dTree 4.0 so that the order is shared. This would be handy to order any other list on the page to reflect the menu too.

I can put in an instance of the menu but the way to output the IDs seems impossible to find, even in wp-includes/nav_menu_template.php