AngularJS引导导航栏

我正在尝试让bootstraps导航栏根据来自angular控制器的数据显示和删除html元素。

我有以下的jade代码：

div.navbar.navbar-fixed-top
    div.navbar-inner
        div.container-fluid(data-ng-controller="NavCtrl")

            a.btn.btn-navbar(data-toggle='collapse', data-target='.nav-collapse')
                span.icon-bar
                span.icon-bar
                span.icon-bar

            div.nav-collapse.collapse
                ul.nav
                    li  
                        a(href='/topics') Topics
                    li(ng-show="curUser.admin")
                        a(href='/users') Users
                    li(ng-show="curUser.admin")
                        a(href='/organizations') Organizations
                    li(ng-show="curUser.admin")
                        a(href='/topicConfs') TopicConfig
                    li.divider
                ul.nav.pull-right
                    {{authenticated}}
                    li.dropdown(ng-show="authenticated")
                        a.dropdown-toggle(role='button', data-toggle='dropdown', href='#') {{curUser.email}}
                            b.caret
                        ul.dropdown-menu(role='menu')
                            li
                                a(href='/users/{{curUser._id}}') Profile
                            li.divider
                            li
                                a.btn(ng-click="logout()") Logout 

以及以下的控制器：

function NavCtrl($location, $scope, $rootScope, CurrentUser){
  $scope.curUser = CurrentUser.getUser()
  $scope.authenticated = CurrentUser.isAuthenticated()

  $rootScope.$on('$routeChangeStart', function(){
    $scope.curUser = CurrentUser.getUser()
    $scope.authenticated = CurrentUser.isAuthenticated()
  })


  $scope.logout = function(){
    CurrentUser.logout(function(result){
      $scope.curUser = CurrentUser.getUser()
      $scope.authenticated = CurrentUser.isAuthenticated()
      console.log("authenticated before logout is %j", $scope.authenticated)

      $location.url('/')
    })
  }
}

一切都正常显示，直到 $scope.authenticated 被设置为 false 并且 $scope.user 被设置为 {}，在这种情况下，nav-bar中的任何ng-show属性都没有更新。

我需要做什么才能使bootstraps导航元素响应于$scope变量的变化？