rf3main/merchant/views/main/home.php

<?php

use common\helpers\Url;

$this->title = '首页';
$this->params['breadcrumbs'][] = ['label' => $this->title];
?>

<div class="row">
    <div class="col-sm-12">
        <!-- 具体内容 -->
        <div class="box">
        </div>
    </div>
</div>