//view category for Render request
private void _viewCategory(ActionForm form, RenderRequest req, RenderResponse res) throws Exception {
User user = _getUser(req);
Category cat = new Category();
if(req.getParameter("inode") != null && !req.getParameter("inode").equals("null") && InodeUtils.isSet((req.getParameter("inode"))))
cat = (Category) categoryAPI.find(req.getParameter("inode"), user, false);
req.setAttribute(WebKeys.CATEGORY_EDIT, cat);
req.setAttribute(WebKeys.CATEGORY_LIST_TOP, categoryAPI.findTopLevelCategories(user, false));