link

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

myApp.controller('TestCtrl', ['$scope', function($scope) {
    $scope.jobs = [{ title: 'First', description : 'Something' }, 
                   { title: 'Second', description : 'Another thing' }];   
    $scope.state = { selected: undefined };
    
    $scope.toggle = function(index) {
        $scope.state.selected = ($scope.state.selected != index ? index : undefined);   
    }
}]);


<div class="col span_2_of_3" ng-controller="TestCtrl">
    <div ng-repeat="item in jobs">
        <accordion>
            <accordion-group ng-click="toggle($index)">
            <accordion-heading>
                <h2>
                "{{item.title}}"
                    <i class="pull-right glyphicon "
                    ng-class="{'glyphicon-chevron-up': $index == state.selected,
                        'glyphicon-chevron-down': $index != state.selected }"></i>
                </h2>
            </accordion-heading>
               {{item.description}}
            </accordion-group>
         </accordion>
    </div>
</div>