ionic-framework/e2e/list/sticky/main.html

<ion-content>
  <ion-list>
    <ion-item-group *ng-for="#group of groups">
      <ion-item-divider sticky>{{group.title}}</ion-item-divider>
      <ion-item *ng-for="#item of group.items">
        {{item.title}}
      </ion-item>
    </ion-item-group>
  </ion-list>
</ion-content>