Yii2 Wie kann ich eine zusätzliche Klasse, die Bezeichnung der Menüpunkte

Nur open-source-Nav widget:

/**
     * @var array list of items in the nav widget. Each array element represents a single
     * menu item which can be either a string or an array with the following structure:
     *
     * - label: string, required, the nav item label.
     * - url: optional, the item's URL. Defaults to "#".
     * - visible: boolean, optional, whether this menu item is visible. Defaults to true.
     * - linkOptions: array, optional, the HTML attributes of the item's link.
     * - options: array, optional, the HTML attributes of the item container (LI).
     * - active: boolean, optional, whether the item should be on active state or not.
     * - items: array|string, optional, the configuration array for creating a [[Dropdown]] widget,
     *   or a string representing the dropdown menu. Note that Bootstrap does not support sub-dropdown menus.
     **/

also, wenn Sie wollen, fügen Sie der Klasse zum li-Element mit

['label'=>'Home', 'url'=>['site/index'],'options'=>['class'=>'list-group-item']]

wenn Sie möchten, um Sie auf Klasse hinzufügen, um link

[
  'label'=>'Home', 
  'url'=>['site/index'],
  'options'=> ['class'=>'list-group-item'],
  'linkOptions'=>['class'=>'item-a-class'],
]