How do I create a Custom Post Box that Connects Different Posts Together

Question

In WordPress, I'm trying to create a Custom Post Box that will allow one post to be manually connected to another post.

The easiest way to illustrate this request was to mockup what I would like the final Post Box to look like. That mockup can be viewed here » http://cl.ly/3hI3

Requirements:

• The Post Box needs to resemble the "Categories" Post Box, in that it has tabs at the top and checkboxes.

• Each tab at the top of this Post Box needs to be a Post Category (as illustrated in the mockup.) If I could manually control this so that the tabs were managed by a Custom Menu (ie. "Post Connections Menu"), that would be ideal.

• The checkboxed list of items needs to be posts that have already been categorized to that specific category.

Thank you very much for any help / insight you can throw my way!

Answer 1

Hey Mike -- does it need to be connected to another post, or can it be a custom taxonomy or custom field?

Answer 2

You're basically looking for custom taxonomies (Wordpress Codex). Then you need to create a plugin that adds a meta box to the post editor (Wordpress Codex) and lists your taxonomies form therein. The code to create a form for a taxonomy ships with wordpress itself.

Related Question: Adding Page Attributes Metabox and Page Templates to the Posts Edit Page?