AngularJS Example:

HTML

<br /><br /><br />

<div ng-app="app" ng-controller="Controller">
  <div class="row" ng-repeat="number in getNumbers(numbers.length / 3)">
    <div class="col-md-4">
      <div class="panel panel-default panel-primary">
        <div class="panel-heading">
          Intestazione {{number}}
        </div>
        <div class="panel-body">
          Body {{number}}
        </div>
      </div>
    </div>
  </div>
</div>

CSS

</style> <!-- Ugly Hack due to jsFiddle issue: http://goo.gl/BUfGZ --> 
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.7.2/angular.min.js"></script>
<style>

JavaScript

angular.module('app', [])
	.controller('Controller', function ($scope) {
    	$scope.numbers = [1, 2, 3, 4, 5, 6];
      $scope.getNumbers = function(number) {
      	for(var n = 1; n <= $; n++) 
        	numbers.push(n);
        return numbers;
      }
	});