$.each(errors, function(key, value){
	if(key == 'email') {
		error['email'] = value;
		$scope.errorbox1 = true;
	} else {
		$scope.errorbox1 = false;
	}
	if(key == 'first_name') {
		error['first_name'] = value;
		$scope.errorbox2 = true;
	} else {
		$scope.errorbox2 = false;
	}
	if(key == 'last_name') {
		error['last_name'] = value;
		$scope.errorbox3 = true;
	} else {
		$scope.errorbox3 = false;
	}
});
$scope.errors = error;


//////////////////////////////VIEW///////////////////////////////
<input type="text" ng-model="user.email" ng-class="{errorbox:errorbox1}" class="form-control" id="title" placeholder="User email"/>
<input type="text" ng-model="user.first_name" ng-class="{errorbox:errorbox2}" class="form-control" id="year" placeholder="User name"/>
<input type="text" ng-model="user.last_name" ng-class="{errorbox:errorbox3}" class="form-control" id="year" placeholder="User name"/>