this.loading = true; // init as true just before $http call
$http({
       method: 'POST',
       url: "URL",
       data: "myParam"
       }).then(function successCallback(response) {
              // after getting response set the loading variable to false
              this.loading = false;
          });

<div ng-if="!ctrl.loading>
   //your original html content here
</div>