Ion card list filter by segment button value not working

HtmL -
<ion-segment [(ngModel)]=“submenu” style=“background-color: hotpink” width=“50px”>
<ion-segment-button value=“0” style=“color:ghostwhite” (ionSelect)=“filterMenu()”>
All

<ion-segment-button value=“1” style=“color:ghostwhite” (ionSelect)=“filterMenu()”>
Hair

<ion-segment-button value=“2” style=“color:ghostwhite” (ionSelect)=“filterMenu()”>
Face

<ion-segment-button value=“3” style=“color:ghostwhite” (ionSelect)=“filterMenu()”>
Skin

<ion-segment-button value=“4” style=“color:ghostwhite” (ionSelect)=“filterMenu()”>
Nail

<ion-segment-button value=“5” style=“color:ghostwhite” (ionSelect)=“filterMenu()”>
Perfume


<ion-content fullscreen="" no-paddding shrink-header [headerToHide]="‘home-header’">

<ion-card *ngFor="let feed of feeds">

    <ion-item sticky>
        <ion-avatar item-left>
            <img [src]="feed.imgProfile">
            <ion-fab middle right edge class="hello pop-in">
                <button ion-fab mini color="light"><ion-icon name="md-share"></ion-icon></button>
                <ion-fab-list side="left">
                    <button ion-fab><ion-icon name="logo-facebook"></ion-icon></button>
                    <button ion-fab><ion-icon name="logo-twitter"></ion-icon></button>
                    <button ion-fab><ion-icon name="logo-vimeo"></ion-icon></button>
                    <button ion-fab><ion-icon name="logo-googleplus"></ion-icon></button>
                </ion-fab-list>
            </ion-fab>
        </ion-avatar>
        <h2>{{feed.name}}</h2>
        <h6>{{feed.catName}}</h6>
        <h6 [hidden]="true">{{feed.category}}</h6>
    </ion-item>
    <ion-slides pager style="width:100% ; height:250px; margin:0 auto" autoplay="4000" loop="true" (click)="openFullImage(i, feed.images)">
        <ion-slide *ngFor="let images of feed.images; let i = index" [ngStyle]="{'background' : 'url(' + images.url + ')'}">
        </ion-slide>
    </ion-slides>

    <ion-row>
        <ion-card-content>
            <ion-card-title (click)="FeedDetail()">
                {{feed.name}}
            </ion-card-title>
            <p>
                {{feed.description}}
            </p>
        </ion-card-content>

    </ion-row>


    <ion-row>
        <ion-col>
            <button ion-button icon-left clear color="gray">
                <ion-icon name="md-heart"></ion-icon>
                <div>{{feed.like}}</div>
            </button>
        </ion-col>

        <ion-col>
            <button ion-button icon-left clear color="gray">
                <ion-icon name="md-chatboxes"></ion-icon>
                <div>{{feed.comment}}</div>
            </button>
        </ion-col>

        <ion-col>
            <button ion-button icon-left clear color="gray">
                <ion-icon name="time"></ion-icon>
                <div style="font-size:12px">{{feed.startTime}}</div>
            </button>
        </ion-col>

    </ion-row>

</ion-card>

.ts
export class HomePage {
@ViewChild(Slides) slides: Slides;
submenu: string ;
searchTerm: string = ‘’;
feed: any;
feeds: any[] = [];
feedView: string = “activity”;

constructor(public navCtrl: NavController, public navParams: NavParams, public loadingCtrl: LoadingController, public afDB: AngularFireDatabase, private toastCtrl: ToastController,
public alertCtrl: AlertController, public db: DatabaseProvider, private cf:ChangeDetectorRef, public modalCtrl: ModalController) {

this.submenu ="0";


let loadingPopup = this.loadingCtrl.create({
  spinner: 'crescent',
  content: ''
});

loadingPopup.present();

let that = this;
db.getAllCollections('feed')
    .then(function (e) {
        if (!!e) {
            console.log(e)
            that.feeds = e;
            that.filterMenu();
        }
        loadingPopup.dismiss()
    });

}
filterMenu(){
this.feeds= this.filterCategory(this.feeds, this.submenu)

}
filterCategory(feeds, submenu) {
if(submenu !=‘0’) {
return feeds.filter((item) => {
return item.category.toLowerCase().indexOf(submenu.toLowerCase()) > -1;
});
}else{
return feeds;
}}

openFullImage(getIndex, imgGallery) {
  let modal = this.modalCtrl.create(GalleryModal, {
      photos: imgGallery,
      closeIcon: 'close-circle',
      initialSlide: getIndex
  });
  modal.present();
}

FeedDetail(obj){
this.navCtrl.push(‘FeedDetailPage’, { categoryId: obj.$key, name: obj.name})
}

}

Hi, Everyone. Please! any suggestion?