<div>
    <select ng-model="model.value" required name="orientation">
        <option value="horizontal">Horizontal</option>
        <option value="vertical">Vertical</option>
    </select>

    <span class="help-inline" val-msg-for="orientation" val-toggle-msg="required">
        <localize key="general_required">Required</localize>
    </span>
</div>