antshop/backend/views/layouts/sidebar.php

<?php

use iron\widgets\Menu;

?>
<aside class="main-sidebar sidebar-dark-info elevation-4">
    <a href="#" class="brand-link">
        <img src="/img/logo.jpeg" alt="AdminLTE" class="brand-image img-circle elevation-3"
             style="opacity: .8">
        <span class="brand-text font-weight-light">AdminLTE 3</span>
    </a>
    <!-- sidebar: style can be found in sidebar.less -->
    <section class="sidebar">
        <?php

        ?>
    </section>
    <!-- /.sidebar -->
</aside>