Using /%category%/%postname%/ for the permalink I get a URL string of all the categories that the specific post is included in. I would like the categories in the url to be filtered down.here it is,

I have a celebrity gossip blog and I have this category structure: 
www.myblog.com/category_1 › sub category_1 ›sub category_2 > Post_name

ex: www.myblog.com/pics/a to c/Aniana Lema /myPostName

I would like to skip the "subcategory_1"  in the URL
ex: www.myblog.com/pics/Ariana Lema/myPostName

Is it possible?