wp_list_pages sort order by custom nav menu order

Using wp_list_pages you can sort order only by:

• ‘post_title’
• ‘menu_order’
• ‘post_date’
• ‘post_modified’
• ‘ID’
• ‘post_author’
• ‘post_name’

anything else (like order by custom menu order) you would have to write your own function.
But a better way to get it done would be to create a custom walker for it so you could control the output.