How to create list of links in external PHP file

array( 
            array('title'=>'Home', 'URL'=>'/'), 
            array('title'=>'About Us','URL'=>'/about/', 'children'=>array( 
                array('title'=>'Company History','URL'=>'/about/history.php'), 
                array('title'=>'Franchise Information','URL'=>'/about/franchise.php'), 
                array('title'=>'Shareholders Information','URL'=>'/about/shareholders.php'), 
            )), 
            array('title'=>'Services', 'URL'=>'/services/'), 
            array('title'=>'Contact Us', 'URL'=>'/contact/'), 
        ); 

include_once(dirname(__FILE__).'/manager/includes/config.inc.php');
include_once(MODX_MANAGER_PATH.'/includes/document.parser.class.inc.php');
$modx = new DocumentParser;

<?php 
if (!defined('IN_WPRO')) exit; 

include_once($modx->config['base_path'].'manager/includes/document.parser.class.inc.php');

class wproPlugin_modxLinks { 
    
    function onBeforeGetLinks(&$editor) { 
        // Add some links that you can choose from when inserting a hyperlink: 
        /*$editor->links = array( 
            array('title'=>'Home', 'URL'=>'/'), 
            array('title'=>'About Us','URL'=>'/about/', 'children'=>array( 
                array('title'=>'Company History','URL'=>'/about/history.php'), 
                array('title'=>'Franchise Information','URL'=>'/about/franchise.php'), 
                array('title'=>'Shareholders Information','URL'=>'/about/shareholders.php'), 
            )), 
            array('title'=>'Services', 'URL'=>'/services/'), 
            array('title'=>'Contact Us', 'URL'=>'/contact/'), 
        );*/ 
        
        $editor->links = getSiteMap(0);
    } 
    
}



$modx = new DocumentParser;
$site_root = 0;

$pages = array();
$i = 0;
function getSiteMap($parentId) {
	global $modx;
	global $pages;
	global $i;
	$items = $modx->getAllChildren($parentId,'menuindex ASC, pagetitle','ASC','id,isfolder,pagetitle,description,parent,alias,longtitle,published,deleted,hidemenu');
	
	foreach($items as $item) {
		if ( $item['isfolder'] == 0 ) {
			$pages[$i] = array(
				'title'		=> "'" . $item['pagetitle']."'",
				'URL' 		=> $modx->makeUrl($item['id']));
		} else {
			$pages[$i] = array(
				'title' 	=> "'" . $item['pagetitle']."'",
				'URL' 		=> $modx->makeUrl($item['id']));
				$children = $modx->getAllChildren($item['id'],'menuindex ASC, pagetitle','ASC','id,isfolder,pagetitle,description,parent,alias,longtitle,published,deleted,hidemenu');
					
				foreach($children as $child) {
					$pages[$i]['children'][] = array(
						'title'		=> "'" . $child['pagetitle']."'",
						'URL' 		=> $modx->makeUrl($child['id']));

				}
		}
		$i++;
		
	}
	
	return $pages;

};
 
?>

require_once("manager/includes/config.inc.php");

include_once($modx->config['base_path'].'manager/includes/document.parser.class.inc.php');

<?php
$start = array (array ('id'=>0));
$map = getSiteMap($start);
//print_r($map);

function getSiteMap($items)
{
    global $modx;
    $pages = array ();
    foreach ($items as $item)
    {
        $page = array ();
        $page['title'] = $item['pagetitle'];
        $page['URL'] = $modx->makeUrl($item['id']);
        $children = $modx->getAllChildren($item['id'], 'menuindex ASC, pagetitle', 'ASC', 'id,isfolder,pagetitle,description,parent,alias,longtitle,published,deleted,hidemenu');
        if (count($children) > 0)
        {
            $children = getSiteMap($children);
            $page['children'] = $children;
        }
        $pages[] = $page;
    }

    return $pages;
}
?>

<?php
 
	if (!defined('IN_WPRO')) exit;
	 
	include_once($modx->config['base_path'].'manager/includes/document.parser.class.inc.php');
	$modx 	= new DocumentParser;
	$fields = 'id,pagetitle,longtitle,description,parent,alias,isfolder,published,deleted,hidemenu';
	
	class wproPlugin_modxLinks {     
	    function onBeforeGetLinks(&$editor) {
	    		global $modx; 
	    		$start = array(
	    			array (
	    				'id' 		=> 0,
	    				'pagetitle' => $modx->config['site_name']
	    			)
	    		);
				$editor->links = getMODxLinks( $start );
	    } 
	}
	
	function getMODxLinks($items) {
	    global $modx, $fields;
	    $pages = array ();
	    
	    foreach ($items as $item) {
	        $page = array();
	        $page['title'] 	= $item['pagetitle'];
	        $page['URL'] = ($item['id'] > 0) ? $modx->makeUrl($item['id']) : '';
	        
	        $children = $modx->getAllChildren($item['id'], 'menuindex ASC, pagetitle ASC', $fields);
	        
	        if (count($children) > 0) {
	            $children = getMODxLinks($children);
	            $page['children'] = $children;
	        }
	        
	        $pages[] = $page;
	    }
	
	    return $pages;
	};

?>