NSArray *newArr = [mainArray mutableCopy];
[[newArr objectAtIndex:indexpath.section] replaceObjectAtIndex:indexpath.row withObject:@""];
[[mainArray objectAtIndex:indexpath.section] removeObjectAtIndex:indexpath.row];
objAppDelegate.arrayProfile = [newArr objectAtIndex:2];

NSArray *newArr = [mainArray copy];

NSMutableArray *newArr = [[NSMutableArray alloc] initWithCapacity:mainArray.count];
for (NSObject* item in mainArray) {
    [newArr addObject:[item copy]];
}