public function setParent($parent)
	{
		if ($parent instanceof JCategoryNode || is_null($parent))
		{
			if (!is_null($this->_parent))
			{
				$key = array_search($this, $this->_parent->_children);
				unset($this->_parent->_children[$key]);
			}

			if (!is_null($parent))
			{
				$parent->_children[] = & $this;
			}

			$this->_parent = $parent;

			if ($this->id != 'root')
			{
				if ($this->parent_id != 1)
				{
					$this->_path = $parent->getPath();
				}

				$this->_path[] = $this->id . ':' . $this->alias;
			}

			if (count($parent->_children) > 1)
			{
				end($parent->_children);
				$this->_leftSibling = prev($parent->_children);
				$this->_leftSibling->_rightsibling = & $this;
			}
		}
	}