File Source for menu

<?php
/**
* @author xing <xing@synapse.plus.com>
* @version $Revision: 1.4 $
* @package nexus
* @subpackage functions
*/
/**
* required setup
*/
require_once( '../bit_setup_inc.php' );
global $gBitSystem;
require_once( NEXUS_PKG_PATH.'Nexus.php');
include_once( NEXUS_PKG_PATH.'menu_lookup_inc.php' );
$gBitSystem->verifyPermission( 'p_nexus_create_menus' );
if( empty( $_REQUEST['menu_id'] ) ) {
header( 'Location:'.NEXUS_PKG_URL.'index.php' );
}
// if someone wants to move and item, move it.
if( isset( $_REQUEST['move_item'] ) && isset( $_REQUEST['item_id'] ) ) {
if( $_REQUEST['move_item'] == 'w' ) {
$gNexus->moveItemWest( $_REQUEST['item_id'] );
} elseif( $_REQUEST['move_item'] == 'n' ) {
$gNexus->moveItemNorth( $_REQUEST['item_id'] );
} elseif( $_REQUEST['move_item'] == 's' ) {
$gNexus->moveItemSouth( $_REQUEST['item_id'] );
} elseif( $_REQUEST['move_item'] == 'e' ) {
$gNexus->moveItemEast( $_REQUEST['item_id'] );
}
header( 'Location: '.NEXUS_PKG_URL.'menu_sort.php?menu_id='.$_REQUEST['sort_menu'].'&tab='.$_REQUEST['tab'] );
die;
}
if( isset( $_REQUEST['tab'] ) ) {
$gBitSmarty->assign( $_REQUEST['tab'].'TabSelect', 'tdefault' );
}
// this is the module filename
$gBitSmarty->assign( 'nexus_file', strtolower( 'mod_'.preg_replace( "/ /", "_", $gNexus->mInfo['title'] ).'_'.$gNexus->mInfo['menu_id'].'.tpl' ) );
$gBitSystem->setBrowserTitle( 'Nexus Menus' );
$gBitSystem->display( 'bitpackage:nexus/menu_sort.tpl' );
?>

Source for file menu_sort.php