ionic-framework/ionic/components/item/test/groups/session-list.html

<ion-navbar *navbar>
  <ion-title>Item Groups</ion-title>
  <ion-buttons end>
    <button (click)="reload()">Reload</button>
  </ion-buttons>
</ion-navbar>

<ion-content class="outer-content">

  <ion-list>
    <ion-item-group *ngFor="#timeSlot of data">

      <ion-item-divider sticky>
        {{timeSlot.time}}
      </ion-item-divider>

      <ion-item-sliding *ngFor="#session of timeSlot.talks" [attr.category]="session.category" #slidingItem>
        <button ion-item (click)="openSession(session)">
          <h3>{{session.name}}</h3>
          <p>
            <span>{{session.timestart}}</span>
            &mdash;
            <span>{{session.timeend}}</span>
            :
            <span>{{session.location}}</span>
          </p>
        </button>
        <ion-item-options>
          <button (click)="addFavorite(timeSlot, session, slidingItem)">Add to<br>Favorites</button>
        </ion-item-options>
      </ion-item-sliding>
    </ion-item-group>

  </ion-list>

</ion-content>