backend/views/layouts/main.php

<?php
    
    /**
     * @var string $content
     * @var \yii\web\View $this
     */
    
    use artweb\artbox\core\widgets\FleshWidget;
    use hiqdev\assets\pnotify\PNotifyAsset;
    use yii\helpers\Html;
    use yii\web\View;
    
    $bundle = yiister\gentelella\assets\Asset::register($this);
  
?>
<?php $this->beginPage(); ?>
<!DOCTYPE html>
<html lang="<?= Yii::$app->language ?>">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  <meta charset="<?= Yii::$app->charset ?>" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
    <?= Html::csrfMetaTags() ?>
  <title><?= Html::encode($this->title) ?></title>
    <?php $this->head() ?>
  <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
  <!--[if lt IE 9]>
  <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
  <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
  <![endif]-->
</head>
<body class="nav-md">
<?php $this->beginBody(); ?>
<div class="container body">
  <div class="main_container">
    <div class="col-md-3 left_col">
      <div class="left_col scroll-view">
        <div class="navbar nav_title" style="border: 0;">
          <a href="/" class="site_title"><i class="fa fa-paw"></i> <span>Gentellela Alela!</span></a>
        </div>
        <div class="clearfix"></div>
        <!-- menu prile quick info -->
        <div class="profile">
          <div class="profile_pic">
            <img src="http://placehold.it/128x128" alt="..." class="img-circle profile_img">
          </div>
          <div class="profile_info">
            <span>Welcome,</span>
            <h2>John Doe</h2>
          </div>
        </div>
        <!-- /menu prile quick info -->
        <br />
        <!-- sidebar menu -->
        <div id="sidebar-menu" class="main_menu_side hidden-print main_menu">
          <div class="menu_section">
            <h3>General</h3>
              <?=
                  \yiister\gentelella\widgets\Menu::widget(
                      [
                          "items" => [
                              ["label" => "Home", "url" => "/", "icon" => "home"],
                              ["label" => "Layout", "url" => ["site/layout"], "icon" => "files-o"],
                              ["label" => "Error page", "url" => ["site/error-page"], "icon" => "close"],
                              [
                                  "label" => "Widgets",
                                  "icon" => "th",
                                  "url" => "#",
                                  "items" => [
                                      ["label" => "Menu", "url" => ["site/menu"]],
                                      ["label" => "Panel", "url" => ["site/panel"]],
                                  ],
                              ],
                              [
                                  "label" => "Badges",
                                  "url" => "#",
                                  "icon" => "table",
                                  "items" => [
                                      [
                                          "label" => "Default",
                                          "url" => "#",
                                          "badge" => "123",
                                      ],
                                      [
                                          "label" => "Success",
                                          "url" => "#",
                                          "badge" => "new",
                                          "badgeOptions" => ["class" => "label-success"],
                                      ],
                                      [
                                          "label" => "Danger",
                                          "url" => "#",
                                          "badge" => "!",
                                          "badgeOptions" => ["class" => "label-danger"],
                                      ],
                                  ],
                              ],
                              [
                                  "label" => "Multilevel",
                                  "url" => "#",
                                  "icon" => "table",
                                  "items" => [
                                      [
                                          "label" => "Second level 1",
                                          "url" => "#",
                                      ],
                                      [
                                          "label" => "Second level 2",
                                          "url" => "#",
                                          "items" => [
                                              [
                                                  "label" => "Third level 1",
                                                  "url" => "#",
                                              ],
                                              [
                                                  "label" => "Third level 2",
                                                  "url" => "#",
                                              ],
                                          ],
                                      ],
                                  ],
                              ],
                          ],
                      ]
                  )
              ?>
          </div>
        </div>
        <!-- /sidebar menu -->
        
      </div>
    </div>
    <!-- top navigation -->
    <div class="top_nav">
      <div class="nav_menu">
        <nav class="" role="navigation">
          <div class="nav toggle">
            <a id="menu_toggle"><i class="fa fa-bars"></i></a>
          </div>
          <ul class="nav navbar-nav navbar-right">
            <li class="">
              <a href="javascript:;" class="user-profile dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
                <img src="http://placehold.it/128x128" alt=""><?=Yii::$app->user->identity->username?>
                <span class=" fa fa-angle-down"></span>
              </a>
              <ul class="dropdown-menu dropdown-usermenu pull-right">
                <li>
                  <a href="#"><i class="fa fa-user pull-right"></i> Profile</a>
                </li>
                <li>
                    <?= Html::a(
                        Html::tag('i', '', [ 'class' => 'fa fa-cogs pull-right' ]) . ' Settings',
                        [ '/settings' ]
                    ) ?>
                </li>
                <li>
                    <?= Html::a(
                        Html::tag('i', '', [ 'class' => 'fa fa-sign-out pull-right' ]) . ' Log out',
                        [ '/site/logout' ],
                        [
                            'data-method' => 'POST',
                        ]
                    ) ?>
                </li>
              </ul>
            </li>
            
          </ul>
        </nav>
      </div>
    </div>
    <!-- /top navigation -->
    <!-- page content -->
    <div class="right_col" role="main">
        <?php if (isset($this->params['h1'])): ?>
          <div class="page-title">
            <div class="title_left">
              <h1><?= $this->params['h1'] ?></h1>
            </div>
            <div class="title_right">
              <div class="col-md-5 col-sm-5 col-xs-12 form-group pull-right top_search">
                <div class="input-group">
                  <input type="text" class="form-control" placeholder="Search for...">
                  <span class="input-group-btn">
                                <button class="btn btn-default" type="button">Go!</button>
                            </span>
                </div>
              </div>
            </div>
          </div>
        <?php endif; ?>
      <div class="clearfix"></div>
        
        <?= $content ?>
    </div>
    <!-- /page content -->
    <!-- footer content -->
    <footer>
      <div class="pull-right">
        Gentelella - Bootstrap Admin Template by <a href="https://colorlib.com" rel="nofollow" target="_blank">Colorlib</a><br />
        Extension for Yii framework 2 by <a href="http://yiister.ru" rel="nofollow" target="_blank">Yiister</a>
      </div>
      <div class="clearfix"></div>
    </footer>
    <!-- /footer content -->
  </div>
</div>
<?=FleshWidget::widget();?>
<!-- /footer content -->
<?php $this->endBody(); ?>
</body>
</html>
<?php $this->endPage(); ?>