This adds a hook to the `Simple Custom Post Order` plugin `update_menu_order()` function.

Simple Custom Post Order - hook

	function update_menu_order() {
		global $wpdb;

		parse_str( $_POST['order'], $data );

		if ( is_array( $data ) ) {


			$id_arr = array( );
			foreach ( $data as $key => $values ) {
				foreach ( $values as $position => $id ) {
					$id_arr[] = $id;
				}
			}


			$menu_order_arr = array( );
			foreach ( $id_arr as $key => $id ) {
				$results = $wpdb->get_results( "SELECT menu_order FROM $wpdb->posts WHERE ID = " . $id );
				foreach ( $results as $result ) {
					$menu_order_arr[] = $result->menu_order;
				}
			}

			sort( $menu_order_arr );

			foreach ( $data as $key => $values ) {
				foreach ( $values as $position => $id ) {
					$wpdb->update( $wpdb->posts, array( 'menu_order' => $menu_order_arr[$position] ), array( 'ID' => $id ) );
				}
			}
			
			do_action( 'scpo_update_menu_order', $data );
		}
	}