Config CKFinder to Permission for User in Codeigniter System

In: ckfinder/config.php

Default is:
$baseUrl = 'static_url';

I want $baseUrl is dynamic by $user?

For Example:
$baseUrl = 'data/'.$user.'/images/';

It think you have to use sessions and read the user id from that. I found an article maybe this can help you:

http://realmofwriting.com/integrating-ck...ework-php/

$session_id = $_COOKIE['ci_session'];
$content = file_get_contents(dirname(__FILE__) . '/../../application/cache/ci_session/ci_session' . $session_id);
session_start();
session_decode($content);