"Ask a Question" is a very helpful link, when you are viewing a question or a category and you click "Ask a Question" you will ask a question in the exact category.
I would like to customize a little bit, but found out that it's hard to find the solution.
Of course I'm not asking how to apply CSS style onto it, or change the associated language file.
I would like to hide it on homepage, on tags list page, on tag page, on search result page, user profile page... The reason is that on those pages, there is no categoryid, so users have to manually select the correct category.
Unfortunately, the "Ask a Question" link source code is buried deep in a chain of functions in qa-theme-base.php file (nav --> nav_list --> nav_item --> nav_link)
I cannot find a clear-cut solution to customize it, or put it in a widget.