----- template ------
<my-section>
  <header>
    {{dirList.length}}
  </header>
  <section-body>
    <my-dir/>
  </section-body>
</my-section>

----- ng code -----
.directive('dirCtrl', function(){
  return{
    scope: {
    
    },
    template: 'dir-template',
    controller: 'dirCtrl',
    link: function(element, attrs, scope){
    }
  }
})
.controller('myCtrl', function(){
  $scope.dirList = [1, 2, 3];
});