'use strict'

var app = angular.module('myApp', ['ui.bootstrap']);

function onThreadSelect(a,b,c) {
  console.log(a,b,c);
  
}

app.controller('mainCtrl', function ($scope, $sce) {
    $scope.onThreadSelect = function (a,b,c) {
        $scope.threadTemplate = '';
        window.setTimeout(function() {
          $scope.threadTemplate = 'tabs.html';
          $scope.$apply();
        });
    };
});

app.controller('TabsCtrl', function ($scope, $sce) {
    $scope.tabs = [
      { title: "Tab1", template: 'tab1.html', active: false },
      { title: "Tab2", template: 'tab2.html', active: false },
      { title: "FAQ", template: 'tab3.html', active: true }
    ];

    $scope.foo = function (e) {
        e.templateUrl = e.template;
    };


});

app.controller('t1Controller', ['$scope',
  function ($scope) {
    $scope.title = 'tab 1 Controller';
  }
]);

app.controller('t2Controller', ['$scope',
  function ($scope) {
    $scope.title = 'tab 2 Controller';
  }
]);

app.controller('faqController', ['$scope',
  function ($scope) {
    $scope.title = 'faqController Tab';
  }
]);
<!DOCTYPE html>
<html ng-app="myApp">

<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">

  <title>AngularJS Bootstrap tab directive and lazy loading demo</title>
  <link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
  <script src="http://code.angularjs.org/1.2.9/angular.js"></script>
  <script src="http://angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.10.0.js"></script>
  <script src="app.js"></script>
</head>

<body style="margin-left:30px" ng-controller="mainCtrl">

<select ng-model="thread" ng-change="onThreadSelect()">
  <option>aaaaaaaaaaa</option>
  <option>bbbbbbbbbb</option>
  <option>vvvvvvvvvvv</option>
  <option>cccccccccccc</option>
  <option>dddddddddddd</option>
</select>
  <div class="container">
      <ng-include src="threadTemplate"></ng-include>
  </div>

  <script type="text/ng-template" id="tabs.html">
    <div class="row" ng-controller="TabsCtrl">
      <tabset>
        <tab ng-repeat="tab in tabs" heading="{{tab.title}}" select="foo(tab)" active="tab.active" disabled="tab.disabled" >
            <div class="CI_scrollable CI_tab">
              <ng-include src="tab.templateUrl"></ng-include>
            </div>
        </tab>
      </tabset>
    </div>
  </script>
  <script type="text/ng-template" id="tab1.html">
    <div class="row" ng-controller="t1Controller">
      <h2>{{ title }}</h2>
      <hr/>
      aaaaaaaaaaaaa
    </div>
  </script>
  <script type="text/ng-template" id="tab2.html">
    <div class="row" ng-controller="t2Controller">
      <h2>{{ title }}</h2>
      <hr/>
      aaaaaaaaaaaaaa
    </div>
  </script>
  <script type="text/ng-template" id="tab3.html">
    <div class="row" ng-controller="faqController">
      <h2>{{ title }}</h2>
      <hr/>
      aaaaaaaaaaaaaa
    </div>
  </script>
  <body>

</html>