src/app/core/nav/nav.html

<div class="nav">
  <ul>
    <li
      ng-repeat="route in vm.routes track by $index"
      ui-sref-active="active"
      ng-class="vm.isRouteActive(route)">
      <a ng-if="route.state" ui-sref="{{route.state}}" ng-click="vm.activateRoute(route)">
        <i ng-if="route.children" class="fa fa-chevron-right"></i>
        {{route.label}}
      </a>
      <a ng-if="route.url" href="#/{{route.url}}" ng-click="vm.activateRoute(route)">
        <i ng-if="route.children" class="fa fa-chevron-right"></i>
        {{route.label}}
      </a>
      <ul class="child-routes" ng-if="route.children" ng-class="{opened: route.opened}">
        <li ng-repeat="childRoute in route.children | orderBy:'label'" ui-sref-active="active">
          <a ng-if="childRoute.state" ui-sref="{{childRoute.state}}">{{childRoute.label}}</a>
          <a ng-if="childRoute.url" href="#/{{childRoute.url}}">{{childRoute.label}}</a>
        </li>
      </ul>
    </li>
  </ul>
</div>