Modify the file phpcms/modules/admin/category.php:
Replace $r['url'] = siteurl($r['siteid']).$r['url'];
with $r['url'] = $r['url'];
Modify the file phpcms/modules/content/create_html.php and make the following change:
Replace $url = $urls[0];//Absolute path with APP_PATH
with $url = $urls[1];//Relative path without APP_PATH