<ion-tabs>
  <ion-tab [root]="usersPage" tabTitle="Users" tabIcon="people"></ion-tab>
  <ion-tab [root]="profilePage" [rootParams]="{id: currentUserId}"
       tabTitle="Profile" tabIcon="person"></ion-tab>
</ion-tabs>

export class TabsPage {
    usersPage: any = UsersPage;
    profilePage: any = ProfilePage;
    currentUserId:number;
    constructor(public identity: Identity) {
        identity.getCurrentUser().then(u => this.currentUserId = u.id)
    }
}