ryanshoover

Changing your link structure in WordPress can lead to all of your old links breaking and returning a “404”. But no more! If someone goes to an old link for your site, I’ll find the new link and redirect them there automatically.
No configuration. No one-by-one setting of the new link structures. No wrestling with complicated regex patterns. Just install me and relax.
Redirect 404s works with posts, pages, and custom post types (like ecommerce products).
<ul>
<li>Note – the plugin only works for permalink structures where the last “chunk” of the URL is the post name (also called the slug).</li>
</ul>

Redirect Old Links

Did you change your permalink structure and now have old links "404ing"? I'll redirect those old links to their new one for you.

Svetoslav Marinov

orbisius

If you have an existing website and you want to add category to your blog posts links (e.g. by using: /%category%/%postname%/ in Settings > Permalinks) then your visitors 
will most likely run into page not found errors. This plugin checks for such post links and redirects the visitor using permanent (301) redirect to the correct /Category/Permalink link IF the permalinks are setup.
This plugin assumes that you have previously used /%postname%/ in your Settings > Permalinks.
Demo 
http://www.youtube.com/watch?v=L124jV5joTk
Bugs? Suggestions? If you want a faster reponse contact us through our website’s contact form [ orbisius.com ] and not through the support tab of this plugin or WordPress forums. 
We don’t get notified when such requests get posted in the forums.
<a href="http://orbisius.com/go/intro2site?permalinks-to-categorypermalinks" rel="nofollow ugc">Free e-book: How to Build a Website Using WordPress: Beginners Guide</a>
<h4>Author</h4>
Svetoslav Marinov (Slavi) | <a href="http://orbisius.com" title="Custom Web Programming, Web Design, e-commerce, e-store, WordPress Plugin Development, Facebook and Mobile App Development in Niagara Falls, St. Catharines, Ontario, Canada" rel="nofollow ugc">Custom Web and Mobile Programming by Orbisius.com</a>

Permalinks to Category/Permalinks

While it may seem trivial, switching from permalinks to a prefix using a category is tough. Slavi's plugin works just as expected and works out of the box. Definitely recommended.

Works as expected, thanks!

The plugin automatically redirects users who have accessed a blog post link without the category to the one which has the category and therefore avoid …

Redirect Old Links vs Permalinks to Category/Permalinks