Edit in JSFiddle

angular.module('myApp', []).

controller('OuterCtrl', function($scope) {
    $scope.message = 'hello world'
}).

controller('InnerCtrl', function($scope) {
    $scope.labels = ['First', 'Second']
})

<fieldset ng-app="myApp" ng-controller="OuterCtrl">
    Message: <input type="text" ng-model="message"/> {{message}}
    <fieldset ng-controller="InnerCtrl">
        <ul ng-repeat="item in labels">
            {{item}}: <input type="text" ng-model="message"/> {{message}}
        </ul>
    </fieldset>
</fieldset>