<div class="uk-section uk-height-viewport uk-flex uk-flex-middle">
    <div class="uk-container uk-width-2-3@s uk-width-1-2@l uk-width-1-4@xl">

        <ul uk-tab>
            <li class="uk-active"><a href="#">Left</a></li>
            <li><a href="#">Item</a></li>
            <li><a href="#">Item</a></li>
            <li><a href="#">Item</a></li>
            <li><a href="#">Item</a></li>
            <li class="uk-disabled"><a href="#">Disabled</a></li>
        </ul>

    </div>
</div>