I used this code for share image with instagram and this is working with iOS 6.0 but it is not working with iOS 7.

-(IBAction)ShareWithInstagram:(id)sender
{
NSURL *instagramURL = [NSURL URLWithString:@"instagram://app"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL]) {
    NSString *documentsDirectory = [NSString stringWithFormat:@"%@/brimages/",[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES)objectAtIndex:0]];
    
    NSFileManager *manager = [NSFileManager defaultManager];
    NSArray *imageFilenames = [manager contentsOfDirectoryAtPath:documentsDirectory error:nil];
    
    NSString *imageName = [imageFilenames objectAtIndex:page];
    NSString *fullpath = [NSString stringWithFormat:@"%@%@",documentsDirectory,imageName];
    NSString *fullpath1 = [NSString stringWithFormat:@"%@",fullpath];
    //imageToUpload is a file path with .ig file extension
    self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:fullpath1]];
    self.documentInteractionController.UTI = @"com.instagram.exclusivegram";
    self.documentInteractionController.annotation = [NSDictionary dictionaryWithObject:@"my caption" forKey:@"InstagramCaption"];
    [self.documentInteractionController presentOpenInMenuFromRect:[sender frame] inView:self.view animated:YES];
}