Angular: Empty Fiddle

http://angularjs.org/

HTML

<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="MyCtrl">
 <div id='1_1' ng-click="addClassToSelected($event)">div1</div>
<div id='1_2' ng-click="addClassToSelected($event)">div1</div>
<div id='1_3' ng-click="addClassToSelected($event)">div1</div>
<div id='1_4' ng-click="addClassToSelected($event)">div1</div>
<div id='1_5' ng-click="addClassToSelected($event)">div1</div>
<div id='1_6' ng-click="addClassToSelected($event)">div1</div>
<div id='1_7' ng-click="addClassToSelected($event)">div1</div>
</div>

CSS

.bold-selected {
    font-weight: bold;
}

JavaScript

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

//myApp.directive('myDirective', function() {});
//myApp.factory('myService', function() {});

function MyCtrl($scope) {
    $scope.addClassSelected = function(event){
            var id =event.target.id ;
            $('#'+id).addClass("bold-selected");
        };
}