gistfile1.php

function menu_order_filter($menu) {
 //
 // reorder the menu here by operating on $menu
 // which is an array with position => 'url';
 // separators will appear as 
 // 'separator1', 'separator2' ... 'separator-last'
 //
 // example:
 // Array
 // (
 //   [0] => index.php
 //   [1] => separator1
 //   [2] => edit.php
 //      ...
 //   [6] => edit-comments.php
 //   [7] => separator2
 //   [8] => themes.php
 //      ...
 //   [12] => options-general.php
 //   [13] => separator-last
 // )
 //
 return $menu;
}

add_filter('custom_menu_order', create_function('', 'return true;'));
add_filter('menu_order', 'menu_order_filter');