backend/views/cart/view.php

<?php
use yii\helpers\Html;
use yii\grid\GridView;
/* @var $this yii\web\View */
/* @var $model common\models\CartBills */
$this->title = "Заказ № " . $id;
?>
<div class="cart-bills-view">
    <h1><?= Html::encode($this->title) ?></h1>
    <?= GridView::widget([
        'dataProvider' => $provider,
        'layout' =>'{items}',
        'columns'=>[
            'article',
            'brand',
            'importer',
            'descr',
            'count',
            'price',
            'aggregate',
            'status_name',
        ],
    ]); ?>
</div>