[NSSortDescriptor sortDescriptorWithKey:@"category"
                              ascending:YES
                               selector:@selector(localizedCaseInsensitiveCompare:)]]];

NSArray *sortedArray = [goods sortedArrayUsingDescriptors:
                            [NSArray arrayWithObject:
                             [NSSortDescriptor sortDescriptorWithKey: @"category"
                                                           ascending:YES
                                                            selector:@selector(localizedCaseInsensitiveCompare:)]]];

Кулеры
Кулеры
Память
Память
Микрофоны
Блоки питания
Блоки питания
Звуковые карты
Видеокарты
Видеокарты

for (int i = 0; i < sortedArray.count; i++)
{

    NSLog(@"%@", NSLocalizedString([[sortedArray objectAtIndex: i] category], nil));
}

- (NSFetchedResultsController *) fetchedResultsController
{
    if (_fetchedResultsController != nil)
    {
        return _fetchedResultsController;
    }
    NSManagedObjectContext *context = [self managedObjectContext];

    NSFetchRequest *goodsFetchRequest = [[NSFetchRequest alloc] init];
    NSEntityDescription *goodsEntity = [NSEntityDescription entityForName:@"Goods" inManagedObjectContext:context];

    [goodsFetchRequest setEntity: goodsEntity];
    NSError * error = nil;

    NSArray * goods = [_managedObjectContext executeFetchRequest: goodsFetchRequest error:&error];

    NSSortDescriptor *categoryDescriptor = [[NSSortDescriptor alloc] initWithKey: @"category" ascending: YES ];
    NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey: @"name" ascending: YES selector: @selector(localizedCaseInsensitiveCompare:)];

    NSArray *sortedArray = [goods sortedArrayUsingDescriptors:
                            [NSArray arrayWithObject:
                             [NSSortDescriptor sortDescriptorWithKey: @"category"
                                                           ascending:YES
                                                            selector:@selector(localizedCaseInsensitiveCompare:)]]];




       NSLog(@"------");
        for (int i = 0; i < sortedArray.count; i++)
       {

          NSLog(@"%@", NSLocalizedString([[sortedArray objectAtIndex: i] category], nil));
       }

    NSArray *sortDescriptors = @[categoryDescriptor, nameDescriptor];

    [goodsFetchRequest setSortDescriptors: sortDescriptors];


    _fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest: goodsFetchRequest managedObjectContext: context sectionNameKeyPath:@"category" cacheName: nil];

    _fetchedResultsController.delegate = self;


    return _fetchedResultsController;
}

NSLog(@"%@", NSLocalizedString([[sortedArray objectAtIndex: i] category], nil));

NSArray *sortedArray = [goods sortedArrayUsingComparator:^(id good1, id good2) {
    NSString *localString1 = NSLocalizedString([good1 category], nil);
    NSString *localString2 = NSLocalizedString([good2 category], nil);
    return [localString1 localizedCaseInsensitiveCompare:localString2];
}];