How to use list_cats filter in WordPress

To use the list_cats filter, you’ll first need to register it using add_filter. You can pop this code into your theme’s functions.php file or, better yet, a custom WordPress Plugin. Why a plugin, you ask? It’s because it keeps everything intact when you update your theme.

Here’s a pro tip: if you ever need to remove a registered hook, you can use remove_filter to take care of that.

Example #1: Modifying Default Category List

In this example, we’ll modify the default category display by creating a function modify_list_cats_defaults. This function takes two parameters and alters the $element variable as needed.

        function weplugins_modify_list_cats_defaults($element, $category) { 
            // Your custom logic to modify $element
            return $element; 
        }
        add_filter( "list_cats", "weplugins_modify_list_cats_defaults", 10, 2 );
        

Example #2: Conditional Category Modification

Want to change category names conditionally? This example shows how you can tweak $element based on certain conditions.

        function weplugins_conditional_modify_list_cats($element, $category) { 
            if ($category && $category->name == 'Uncategorized') {
                $element = 'General';
            }
            return $element; 
        }
        add_filter( "list_cats", "weplugins_conditional_modify_list_cats", 10, 2 );
        

Example #3: Removing the Hook

If you need to undo the changes made by a hook, use the code below to remove the filter. Remember to match the callback function name, priority, and number of arguments.

        remove_filter( "list_cats", "weplugins_modify_list_cats_defaults", 10, 2 );
        

Contact Us

If you’re having any trouble using this hook or need some customization, feel free to Contact Us. We’re here to help!