FRONTEND_MVC/modules/control/views/comments/rss.php

<?php

use  \app\models\base\Comments;
use yii\helpers\Html;
use yii\helpers\Url;
use yii\widgets\ListView;

/** @var yii\web\View $this */
/** @var yii\data\ActiveDataProvider $dataProvider */

	Yii::$app->response->format = \yii\web\Response::FORMAT_RAW;
	Yii::$app->response->headers->set('content-type', 'application/xml;charset=utf-8');
?>
<<?='?'?>xml version="1.0" encoding="UTF-8"<?='?'?>>
<rss version="2.0"
	xml:base="https://www.amic.ru/"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
>

    <channel>
        <title><![CDATA[ИА "Амител" "Последнии коментарии"]]></title>
        <link>https://www.amic.ru/</link>
        <language>ru</language>
<?
	echo ListView::widget([
                        "dataProvider" =>$dataProvider,
                        "itemView" => "_item",
					   "layout" => "{items}",
					   "options" => ['tag' => false],
					   "itemOptions" => ['tag' => false]
                    ]);
?>
    </channel>
</rss>