AngularJS Ajax内容加载器

I am trying to use angularJS to load contents of my HTML from ajax calls. I would like to have a single method with different parameters to vary ajax/REST uri and display results in different components. The (non-running version) code looks something like this:

app.controller('ContentController', function($scope, $sce, $http) {
  $scope.FetchContent = function(pageId) {
    let contentUri = 'https://somewhere/restendpoint/?id=' + pageId;

    $http.get(contentUri).then(function(data) {
      return $sce.trustAsHtml(data.data.d[0].Content);
    }
  }
})

<div ng-controller="ContentController" class="row">
  <div class="col-md-4" ng-bind-html="FetchContent('home')"></div>
  <div class="col-md-4" ng-bind-html="FetchContent('welcome')"></div>
  <div class="col-md-4" ng-bind-html="FetchContent('contact')"></div>
</div>

I end up getting tons of ajax calls generated from this. I've tried creating a custom directive, but it updates all elements with same data. Can anyone give me a pointer? Thanks!!

So.. I was able to get around the repeating ajax calls by using directives instead, and had to embed element Id to lock down the element:

app.controller('ContentController', function($scope, $sce, $http) {
  $scope.FetchContent = function(pageName, elem) {
    var contentUri = 'https://somecontent/restendpoint/?id=' + pageName;
    $http.get(contentUri).then(function (data) {
      $('#' + elem).html(data.data.d[0].HTMLContent);
    });
  }
});


app.directive('loadcontent', function($parse) {
  return {
    restrict: 'A',
    link: function ($scope, elem, attrs) {
      elem.ready(function() {
        $scope.$apply(function() {
          var func = $parse(attrs.loadcontent);
          func($scope, elem)
        });
      });
    }
  };
});

<div ng-controller="ContentController" class="row">
  <div class="col-md-4" id="e1" loadcontent="FetchContent('home', 'e1')"></div>
  <div class="col-md-4" id="e2" loadcontent="FetchContent('home', 'e2')"></div>
  <div class="col-md-4" id="e3" loadcontent="FetchContent('home', 'e3')"></div>
</div>

It works and it inserts unique contents into own elements, but I really don't like the way and can't help but think there's gotta be a better and proper ways to do this... Any ideas from angularJS gurus?