Payplans fire content events

//create pdf file
		$contents.= "</body></html>";

        // Fire event to customoize content
        // onContentPrepare($context, &$article, &$params, $page = 0)
        $article = new stdClass();
        $article->text = $contents;
        $param = null;
        $args  = array();
        $args[] = array('com_payplans.invoice', &$article, &$param, 0);

        JPluginHelper::importPlugin('content');
        XiHelperPlugin::trigger('onContentPrepare', $args);
        $contents = $article->text ;
        // Event Done.