wms-menu/partials/menu/main/_system_sidebar.phtml

<?php
    $context = BackendMenu::getContext();
    if (strpos($context->sideMenuCode, '|') !== false) {
        $menu = explode('|', $context->sideMenuCode);
        $context->mainMenuCode = $menu[0];
        $context->sideMenuCode = $menu[1];
    }
    if (isset($menu)):
?>
    <?= $this->makePartial(__DIR__ . '/../secondary/_sidenav.phtml', [
        'context' => $context,
    ]) ?>
<?php else: ?>
    <div class="layout-cell sidenav-tree bg-p <?=\Wms\Menu\Helpers\Menu::$minimizedCurrentMainMenu?:'';?>" data-control="sidenav-tree" data-search-input="#settings-search-input">
        <a class="back-link" href="<?= Backend::url('wms/menu') ?>"><i class="icon-angle-left"></i><?= e(trans('wms.menu::plugin.name')) ?></a>

        <div class="layout">
            <div class="layout-row min-size">
                <?= $this->makePartial(__DIR__ . '/_system_sidebar_menu_toolbar.phtml') ?>
            </div>

            <div class="layout-row">
                <div class="layout-cell">
                    <div class="layout-relative">

                        <div class="layout-absolute">
                            <div class="control-scrollbar" data-control="scrollbar">
                                <?= $this->makePartial(__DIR__ . '/_system_sidebar_menu.phtml') ?>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
<?php endif; ?>