Joomla 1.5 multiple select menu item custom parameter type

gistfile1.php

<?php defined('_JEXEC') or die;

/**
 * File       menuitems.php
 * Created    6/12/13 11:37 AM
 * Author     Matt Thomas | matt@betweenbrain.com | http://betweenbrain.com
 * Support    https://github.com/betweenbrain/
 * Copyright  Copyright (C) 2013 betweenbrain llc. All Rights Reserved.
 * License    GNU GPL v3 or later
 */

class JElementMenuitems extends JElement {

	var $name = 'Menuitems';

	function fetchElement($name, $value, &$node, $control_name) {

		// Strip out administrator directory of returned value for JPATH_BASE
		$site = str_replace('/administrator', '', JPATH_BASE);

		// Manually register JHTMLMenu class
		JLoader::register('JHTMLMenu', $site . '/libraries/joomla/html/html/menu.php', TRUE);

		// Retrieve all site menu items as an array
		$items = JHTMLMenu::linkoptions();

		/*
		 * Build the multi select list
		 *
		 * $control_name . '[' . $name . '][]' allows us to pass an array into the params object
		 *
		 * - $control_name = params
		 * - $name is passed from the xml document
		 */
		$attribs = 'multiple="true" size="12"';

		return JHTML::_('select.genericlist', $items, $control_name . '[' . $name . '][]', $attribs, 'value', 'text', $value, $control_name . $name);
	}
}

/*
 * References
 *
 * - http://docs.joomla.org/API15:JHTMLSelect/genericlist
 * - http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=15420 (see element.zip)
 * - http://forum.joomla.org/viewtopic.php?p=1439223
 */