Added class to items that have children

@@ -40,6 +40,7 @@ class HierarchicalMenu implements Countable, Iterator {
                 $last_id = $item->ID;
             } elseif ($item->menu_item_parent == $last_id) {
                 $this->contents[$this->id_lookup[$last_id]]->_children = true;
+                $this->contents[$this->id_lookup[$last_id]]->classes[] = 'menu-item-children';
                 $nest[] = $last_id;
 
                 $last_id = $item->ID;
@@ -51,9 +52,10 @@ class HierarchicalMenu implements Countable, Iterator {
             }
         }
 
+        $me = __CLASS__;
         foreach ($this->contents as $key => &$item) {
             if (true === $item->_children) {
-                $item->HierarchicalMenu = new HierarchicalMenu($menu, $item->ID);
+                $item->{str_replace(Array(__NAMESPACE__, '\\'), '', $me)} = new $me($menu, $item->ID);
             }
             unset($this->contents[$key]->_children);
         }