public function hyvesTipUrl($title, $body, $categoryId = 12, $rating = 5) {

        $url = 'http://www.hyves-share.nl/button/tip/?tipcategoryid=%s&rating=%s&title=%s&body=%s';
        $title = $title;
        $body = $body;
        return sprintf($url, $categoryId, $rating, $title, $body);
    }