Combining post categories and link categories?

You can register a custom taxonomy for more than one object type:

register_taxonomy( 'topic', array( 'post', 'link' ), /* more arguments */ );

But be aware that the link manager will be removed in 3.5, so it might be better to use a custom post type for links. You can register a shared taxonomy for that too.

Related Posts:

  1. How to enable category hierarchy for links?
  2. How to display non-hierarchical taxonomy as terms with checkboxes?
  3. Different template for subcategories
  4. Categories’ hierarchy in URL
  5. How to only show posts on last child category
  6. Category links suddenly started giving 404 errors
  7. Categories lose hierarchy order once assigned to post
  8. Any way to assign Post Categories and Tags to Links?
  9. Add Product categories to WordPress menu without losing hierarchy
  10. How can I get an tag to wrap each ancestor that gets outputted in this condition?
  11. how to get the categories for a single post in a hierarchical way
  12. Category tree is flattened inside admin upon saving
  13. Is it possible to select and edit the way the most recent post from a certain category is displayed on the page?
  14. Categories vs. Page Site Organization
  15. Displaying a full post instead of a slug per category?
  16. Link Attachment Image to Category
  17. Class active for Archive link – looped out
  18. Why do my categories redirect?
  19. How to categorize posts under Category 1 and Category 2 which are separate lists of categories, and display them as separate lists in widgets
  20. Get category url in loop
  21. Give a page priority over a category that has the same name?
  22. Add child category to parent on post creation and save
  23. Older entries link within category page
  24. Style category link depending on category ID
  25. How do I make the category sidebar widget (stock) display the total # of posts including those in subcategories?
  26. How to get Next/previous_post_link to go through articles in top parent category
  27. Hierarchical permalink structure for posts showing categories and sub-categories
  28. Get paged category link programmatically
  29. WordPress list categories dropdown with parent-child relation and child under it’s parent
  30. Link To Child Category For A Post
  31. Display only subcategories of a category and not sub-subcategories
  32. How to not display a category post on blog page?
  33. Link from navbar to categories
  34. javascripts files not linking to my category slugs?
  35. How to load several hierarchical categories from functions.php
  36. Check is category parent with ids from the childs – get_term_children
  37. Posts not listing out sub category in hierarchy
  38. wp_insert_link not working
  39. list all child categories that apply to current post even if those cats are empty?
  40. How to list posts from a sub-category that is listed in a parent category (more details below)?
  41. Show subChild categories
  42. Parent Category and Subcategory default text generated with category
  43. outputting taxonomy hierarchy
  44. Show Subcategory Name Instead of Parent Category
  45. Link For Portfolio Categories
  46. Different template for subcategories
  47. How to get the link of all categories
  48. Children categories not shown in dashboard
  49. Most efficient use of custom taxonomies, categories, and pages
  50. Display categories and their IDs
  51. Featured image for links and categories
  52. Categories as selectable links on submission form
  53. Displaying categories and subcategories without link
  54. How to get category slug link? ( include parent categories)
  55. List the category tree of all the product_cat categories
  56. Completely disable categories
  57. get_field not displaying my custom field value
  58. wp_list_categories exclude not working
  59. what is the action hook code to supporting product category condition in single product page of woocommerce?
  60. Posts from multiblt categories but featured image only in the first one, the rest to have the post title only
  61. Conditional Tag for sub cagtegories?
  62. Display only posts from referred category on date archive page
  63. Add a wordpress blog to my website having users
  64. in_category() not working in WordPress 4.9.7
  65. Inserting Category programmatically
  66. Category-slug.php not being used
  67. How to redefine the sorting of product categories by menu_order?
  68. Add category only if post has custom taxonomy category
  69. Restrict author to create subcategory in a selected category
  70. Display list of categories filtered by date?
  71. Redirect single article permalink to paginated category page
  72. List only categories i specify
  73. Author Page – List of categories plus number of posts in that category
  74. How can you access category information from a theme?
  75. Filter WooCommerce archive pages by an additional category
  76. How Do I Delete WordPress Posts Older Than 400 Days, From A WordPress Category
  77. Category Page Template – Can’t get category ID
  78. Shortcode to display all the post from a category in a page
  79. add woocommerce archive description if exist
  80. Can’t display posts by filtering categories using isotope.js
  81. Get a list of categories, separated by / to display inside the for custom metatags
  82. Is there a reason to put a product in both the Child and Parent Categories?
  83. Get_term_meta() always returns false
  84. Get only children category name
  85. Displaying only selected categories
  86. No results found for second level category
  87. get_the_category vs wp_get_post_categories
  88. How to get get_categories()’s ‘hide_empty’ argument to work with global year var in the archive template?
  89. Categories in media library
  90. WordPress Shop and restricting products and categories for some users/groups
  91. Pass list of categories to JS
  92. WP url to get rss with full text of post
  93. Paginating a list of all posts collected by category titles
  94. Customize category query in widget
  95. Page permalink rewrite
  96. Broken category styling
  97. Woocommerce Force the category choice before creating new product? [duplicate]
  98. Custom EndPoint not working when strip child category in URL
  99. Display posts in a random order for a specific category
  100. Why is WordPress adding in a subcategory to my url when it has no parent page?