I'm using k2 tools module set as selection box of categories, which I cant configured to order them alphabetically .

I must say that is selection box of categories and not the list of categories (in that one you have the option to order as you like to)

Thanks,

Unfortunately this is not possible by default.
You can at your own risk edit the function that retrieves the categories.
in modules/mod_k2_tools/helper.php and add ordering.

This post will help you.
www.w3schools.com/sql/sql_orderby.asp

PS. Backup first.

Thanks Krikor for answering so fast!

I will take a look to that

Another thing.. Is there any way to order alphabetically by the introtext of the items? I mean, as you order by the title, order by the introtext instead. Is it possible?

To be honest I do no think that this feature is possible.