/**
* Hide Draft Pages from the menu
*/
function filter_draft_pages_from_menu ($items, $args) {
 foreach ($items as $ix => $obj) {
  if (!is_user_logged_in () && 'draft' == get_post_status ($obj->object_id)) {
   unset ($items[$ix]);
  }
 }
 return $items;
}
add_filter ('wp_nav_menu_objects', 'filter_draft_pages_from_menu', 10, 2);