public function loadList()
    {
        startProfile('buildCategoryList');

        $this->setLoadFull(true);
        $this->selectString($this->_getSelectString(false, null, 'oxparentid, oxsort, oxtitle'));

        // build tree structure
        $this->_ppBuildTree();

        // PostProcessing
        // add tree depth info
        $this->_ppAddDepthInformation();
        stopProfile('buildCategoryList');
    }