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How to Add Category Selection to Custom Post Type

Snippets by IsItWP

Are you looking for a way to add category selection to custom post type? While there’s probably a plugin for this, we have created a quick code snippet that you can use to add category selection to custom post type in WordPress.

Instructions:

All you have to do is add this code to your theme’s functions.php file or in a site-specific plugin:

function reg_cat() {
         register_taxonomy_for_object_type('category','CUSTOM_POST_TYPE');
}
add_action('init', 'reg_cat');

Don’t forget to change the CUSTOM_POST_TYPE to the name of the custom post type you created.

Note: If this is your first time adding code snippets in WordPress, then please refer to our guide on how to properly copy / paste code snippets in WordPress, so you don’t accidentally break your site.

If you liked this code snippet, please consider checking out our other articles on the site like: 43 simple WordPress themes to start a website and how to create a guest post submission form in WordPress.

Comments  Leave a Reply

  1. Iheruamdu Calistus Eberechukwu March 4, 2020 at 9:41 am

    Extremely helpful. Thanks

  2. Doesn’t work

    1. Hi Nat,
      Be sure to change the CUSTOM_POST_TYPE to the name of the custom post type that you made.

  3. It would be cool if you talked about how and why you implemented this approach. As a developer, I like to understand the ‘why’ behind the solution.

    1. The register_taxonomy_for_object_type() function is used because it adds taxonomies to post types.

  4. Hey there, Thanks for this info. I would like to add categories to my woocommerce products to further structure data and pull products into some category based widgets (i realise products have a “product category” already) Can you tell me what the code should read for Woocommerce custom post product types. I am unsure how to find this out.

  5. Extremely helpful (in my hour of need!)
    Thanks so much for sharing 🙂

  6. Mohamed Ramadan March 19, 2012 at 5:19 am

    Thanks 

  7. Adedoyin Kassem April 11, 2011 at 3:20 pm

    Nice approach, but i do think instead of writing this somewhat “much” code, the theme developer should just add this line below into the register_post_type function.

    ‘taxonomies’ => array(‘category’)

    1. Hi Adedoyin
      Yes this is very true, this is just another method to add taxonomies however I have used this method to limit access to taxonomies editing based on role.

  8. Alexandre Klostermann April 5, 2011 at 8:25 pm

    La bamba!

    1. Cool glad you like the snippet, also check out add tag selection.
      http://wpsnipp.com/index.php/functions-php/add-tag-selection-to-custom-post-type/

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