You can not enable that, it is not supported, on top of that there is no meta table for links 🙂
For one of my sites: http://populair.eu I wanted to put each link you see on there in a hierarchical category (obvious if you see the layout). But since it was not supported I put all links in another format and wrote a template to display them in this way.
Related Posts:
- Combining post categories and link categories?
- How to display non-hierarchical taxonomy as terms with checkboxes?
- Different template for subcategories
- Categories’ hierarchy in URL
- How to only show posts on last child category
- Category links suddenly started giving 404 errors
- Categories lose hierarchy order once assigned to post
- Any way to assign Post Categories and Tags to Links?
- Add Product categories to WordPress menu without losing hierarchy
- How can I get an tag to wrap each ancestor that gets outputted in this condition?
- how to get the categories for a single post in a hierarchical way
- Category tree is flattened inside admin upon saving
- Is it possible to select and edit the way the most recent post from a certain category is displayed on the page?
- Categories vs. Page Site Organization
- Displaying a full post instead of a slug per category?
- Link Attachment Image to Category
- Class active for Archive link – looped out
- Why do my categories redirect?
- How to categorize posts under Category 1 and Category 2 which are separate lists of categories, and display them as separate lists in widgets
- Get category url in loop
- Give a page priority over a category that has the same name?
- Add child category to parent on post creation and save
- Older entries link within category page
- Style category link depending on category ID
- How do I make the category sidebar widget (stock) display the total # of posts including those in subcategories?
- How to get Next/previous_post_link to go through articles in top parent category
- Hierarchical permalink structure for posts showing categories and sub-categories
- Get paged category link programmatically
- WordPress list categories dropdown with parent-child relation and child under it’s parent
- Link To Child Category For A Post
- Display only subcategories of a category and not sub-subcategories
- How to not display a category post on blog page?
- Link from navbar to categories
- javascripts files not linking to my category slugs?
- How to load several hierarchical categories from functions.php
- Check is category parent with ids from the childs – get_term_children
- Posts not listing out sub category in hierarchy
- wp_insert_link not working
- list all child categories that apply to current post even if those cats are empty?
- How to list posts from a sub-category that is listed in a parent category (more details below)?
- Show subChild categories
- Parent Category and Subcategory default text generated with category
- outputting taxonomy hierarchy
- Show Subcategory Name Instead of Parent Category
- Link For Portfolio Categories
- Different template for subcategories
- How to get the link of all categories
- Children categories not shown in dashboard
- Most efficient use of custom taxonomies, categories, and pages
- Display categories and their IDs
- Featured image for links and categories
- Categories as selectable links on submission form
- Displaying categories and subcategories without link
- How to get category slug link? ( include parent categories)
- List the category tree of all the product_cat categories
- Flat category URLs but retaining hierarchy?
- Creating a custom feed for categories that includes the first post’s featured image
- Get categories without post
- Display thumbnails for certain category posts
- Hide the word ‘category’ from my permalinks
- School & class blogs – renaming/archiving post categories?
- How to modify default category widget list display?
- Building Menu from Woocommerce Product Categories
- Is there a reason I cannot get the current category in a loop?
- How to get parent category ID in single page template
- List just subcategory and products of active category page in Woocommerce
- Custom Meta Box (SELECT2) Not Saving Taxonomy Terms
- Force category choice before creating new post
- Listing posts under a category by date
- Display content from a specific category using cat ID not working
- Deleting a category from WordPress admin does it remove it completely from the database?
- Exclude categories by ID
- Add description to categories menu in admin
- filter a loop base on specific category
- Last x Posted Categories?
- Custom sidebar isn’t showing up on sub-category posts
- Is there a “sensible” limit to WordPress Categories?
- get_the_category return empty inside loop
- Possible to make get_categories() hide_empty attribute honor excludes from post query?
- Function add class to second menu specific items if the page has a certain category
- How to call Primary Category for WordPress Woocommerce
- Conditional Site Logo(Category Based)
- Show full category tree for a year with all post titles?
- Tag Menu items based on their categories
- How to exclude a specific categogy from a custom page template
- Transfering static site to wordpress and retaining category by month paginations
- Category Templates for Post Types not Working
- Change category base based on category
- altering theme – content generated by PAGES not PORTFOLIO
- Need help with category page customization meeting certain condition
- How do i add custom post types to this query?
- add new input field like category?
- WordPress excerpt for specific posts in category
- How do I get a single page navigation depending on the previous page?
- Structure with category setting
- chose category in plugin
- Do not show all post from all categories, just show posts from category in current loop
- How to prevent page re-sizing for mobile browsers [closed]
- Limit authors on specific catogories
- Trouble Fetching Posts Using WordPress API: No Response from Specific Category