Get all category in list except current category page

Hi,
I am full with my projects.
So I want you help me a little problem.
My problem is:
- In one category page ( example marketing)
- In this page,I want to list all category names or list posts for each category. But I don't want to show category name of current category name.

How can I exclude the current category from list?
Plz help me,
Thanks a lot.