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YII2 nav widget open link in new tab/window and how to link to external link

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echo Nav::widget([

    'options' => ['class' => 'nav navbar-left nav-tabs'],

    'items' => [



        [
           'label' => 'Schedule An Appointment', 
           'url' => 'http://google.com',
           'linkOptions' => ['target' => '_blank']        
        ],


    ],

]);

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