Post Category Prev-Next Link Fix

Fixes the bug in category listing page pagination. When you are using permalink structure as %category%/%postname% , second page URL of category listing page will be category-name/page/2 which WordPress identify \\“page\\“ as post name. And will return 404 error page. This plug-in will fix the issue. This also fix the next and previous buttons bug in while using custom permalink structure. This is also remove category word from the url without using categorybase.