Вывод из foreach в зависимости от url

function show_menu_pin(){
$catalog = 10;  
$answer = $GLOBALS["obj"] -> parse_xml($GLOBALS["obj"] -> sections($catalog));
 
$result = '';
 
 
foreach($answer->folder as $folder) {
        $result .= '<div style="padding-left:10px"><table><tr><td><a href="list_books.php?cat='.$folder['id'].'">'.$folder -> name_folder.'</a> ('.$folder -> cnt_goods.')</td></tr></table></div>'; // категории
 foreach($folder->folder as $folder2) {
          $result .= '<div style="padding-left:20px"><table><tr><td><a href="list_books.php?cat='.$folder2['id'].'">'.$folder2 -> name_folder.'</a> ('.$folder2 -> cnt_goods.')</td></tr></table></div>'; //подкатегории с подкатегориями
    foreach($folder2->section as $section) {
            $result .= '<div style="padding-left:30px"><table><tr><td><a href="list_books.php?id_sec='.$section['id'].'&cat='.$answer -> folder -> folder['id'].'">'.$section -> name_section.'</a> ('.$section -> cnt_goods.')</td></tr></table></div>'; //подкатегория подкатегории
            }}
  foreach($folder->section as $section) {
         $result .= '<div style="padding-left:20px"><table><tr><td><a href="list_books.php?id_sec='.$section['id'].'&cat='.$answer -> folder['id'].'">'.$section -> name_section.'</a> ('.$section -> cnt_goods.')</td></tr></table></div>'; //подкатегориии без подкатегорий   
            } } 
 
 
echo $result;
 
 
}