i am working on WordPress Mu created a custom template

i am working on WordPress Mu

created a custom template to get list of pages in sub site using wp_nav_menu( $defaults );.

now i want give options to subsite admin to rearrange the order of menu and delete pages in menu without going into the wp-admin . like menu management page in wp-admin .
any plugin or any ideas about this.
attached screenshot.

Thanks in advance..