<div ui-view="main">
  <!-- content populated here by AngularJS ui-router -->
  <aside ui-view="sidebar">
    <!-- content populated here by AngularJS ui-router -->
  </aside>
</div>

.state('state1', {
  url: '/',
  views: {
    'main': {
      templateUrl: '/modules/blog/partials/index.html',
      controller: 'BlogController'
    },
    'sidebar': {
      templateUrl: '/modules/core/partials/sidebar.html'
    }
  }
})