Reorder Wordpress Admin Menu Items

reorder-wordpress-admin-menu.php

/**
 * Activates the 'menu_order' filter and then hooks into 'menu_order'
 */
add_filter('custom_menu_order', function() { return true; });
add_filter('menu_order', 'artvsm_new_admin_menu_order');
/**
 * Filters WordPress' default menu order
 */
function artvsm_new_admin_menu_order( $menu_order ) {
  // define your new desired menu positions here
  // for example, move 'upload.php' to position #9 and built-in pages to position #1
  $new_positions = array(
    'upload.php' => 1,
    'edit.php?post_type=page' => 2,
    'edit.php' => 3
  );
  // helper function to move an element inside an array
  function move_element(&$array, $a, $b) {
    $out = array_splice($array, $a, 1);
    array_splice($array, $b, 0, $out);
  }
  // traverse through the new positions and move 
  // the items if found in the original menu_positions
  foreach( $new_positions as $value => $new_index ) {
    if( $current_index = array_search( $value, $menu_order ) ) {
      move_element($menu_order, $current_index, $new_index);
    }
  }
  return $menu_order;
};