Adds additional separators to WordPress's admin dashboard menu

wp_add_admin_menu_separators.php

<?php
// Adds additional separators to WordPress's admin dashboard menu
add_action('admin_menu', 'add_admin_menu_separators');
function add_admin_menu_separators() {
  function add_separator($position) {
    global $menu;

    $index = 0;

    foreach($menu as $offset => $section) {
      if (substr($section[2], 0, 9) == 'separator') $index++;
      if ($offset >= $position) {
        $menu[$position] = array('', 'read', "separator$index", '', 'wp-menu-separator');
        break;
      }
    }

    ksort($menu);
  }

  // Change this index to wherever you'd like to place the separator
  // Repeat the function to add multiple separators
  add_separator(25);
}
?>