code: public static function applyActive(&$Nav)
      {
          if ($Nav) {
              foreach ($Nav as &$one) {
                  if (isset($one['items'])) {
                      self::applyActive($one['items']);
                  }
  
                  if (!isset($one['active'])) {
                      if (is_array($one['url'])) {
  
                          $url = $one['url'][0];
                          $route = Yii::$app->requestedRoute;
                          $params = Yii::$app->request->getQueryParams();
  
                          if ($url === '/' && $route === Yii::$app->controller->module->id . '/dashboard/index') {
                              $one['active'] = true;
                          } else {
                              $url = $one['url'];
                              $urlExploded = explode('/', $url[0]);
  
                              $one['submenuTemplate'] = '';
                              foreach (self::$active as $activeAction) {
                                  $urlExploded[count($urlExploded) - 1] = $activeAction;
                                  $url[0] = implode('/', $urlExploded);
  
                                  $one['items'][] =
                                      [
                                          'label' => $one['label'] . ' - ' . $activeAction,
                                          'url' => $url,
                                          'options' => [
                                              'class' => 'hidden'
                                          ]
                                      ];
  
                                  if ('/' . Yii::$app->request->getQueryParam('parentRoute') === trim($url[0])) {
                                      $one['items'][] =
                                          [
                                              'label' => $one['label'] . ' - Sub List',
                                              'url' => array_merge(['/' . $route], $params),
                                              'options' => [
                                                  'class' => 'hidden'
                                              ]
                                          ];
                                  }
                              }
                          }
                      }
                  }
              }
          }
      }
docs: Apply active attriute depends on route
  @param $Nav