src/form/form-group/form-group.html
<div class="form-group" ng-class="{ 'has-error' : $ctrl.hasErrors() }">
<label for="{{ $ctrl.pfField }}" class="control-label {{ $ctrl.pfLabelClass }}">{{ $ctrl.pfLabel }}</label>
<div class="{{ $ctrl.pfInputClass }}">
<span ng-transclude></span>
<span class="help-block" ng-show="$ctrl.error.messages">
<ul><li ng-repeat="message in $ctrl.error.messages">{{ message }}</li></ul>
</span>
</div>
</div>