<label>Name des Leiters:</label>
<select name="leaderID" id="selectLeaderID">
　　<option ng-repeat="manager in managers" value="http://www.mamicode.com/leader_id={{manager.id}}&leader_name={{manager.name}}&leader_email={{manager.email}}" callback-on-end>{{manager.name}}</option>
</select>

  app.directive("callbackOnEnd", function($timeout) {
      return {
          restrict: "A",
          link: function(scope, element, attrs) {
              if (scope.$last) {
                $timeout(function(){
                  var select = document.getElementById("selectLeaderID");
                  for(var i = 0;i < select.options.length;i++){
                        var parts = [];
                        parts = select.options[i].value.split(‘&‘);
                        if(parts[0].substr(10) == scope.selectLeaderID){
                            select.options[i].selected = true;
                        }
                    }
                });
              }
          }
      };
  });