alekc

Sometimes you don’t want to show parent directories in permalink because they are not really necessary or because you know that in the future your child directory will change it’s parent.
For example: 
+Work in progress 
–Site 1 
–Site 2 
+Work Finished 
–Site 3
In this case Site 3 originally have been part of “Work in progress”, and on job done it has been moved under “Work Finished”.
So if you install this plugin your link will be transformed in this way:
domain.com/parent_category/child_directory/post_name => domain.com/child_directory/post_name 
domain.com/category/parent_category => domain.com/parent_category 
domain.com/category/parent_category/child_directory => domain.com/parent_category/child_directory

Remove Parents

Remove Parents is a tiny plugin which remove "category" and parent categories from permalink.

The plugin allows you to temporarily or permanently filter certain words from the 
title, content, excerpt or tags in posts.
You can choose where to search exactly or select everywhere in the posts. The 
original content of posts is kept safe. You can always go back and show the 
original text.

GSY Content Filter

Filter words from the title, content, excerpt or tags in posts.

Remove Parents vs GSY Content Filter