[wp-hackers] Multiple category boxes / tabs in the Admin Area

[Jennifer Hodgdon]

Unless I misunderstood, I don't think he's trying to define his own 
taxonomies. I think he has a large hierarchy within the standard Post 
  Categories taxonomy, and he wants to display each top-level category 
in its own box on the post edit screen, and also hide the existing 
category/tag boxes.

If that is correct, then yes you should create your own with 
add_meta_box() in a plugin. Any recent plugin that adds things to the 
post edit screen should have some examples, or if all else fails, read 
the documentation and try to do something similar:

http://codex.wordpress.org/Function_Reference/add_meta_box

You will want to make sure that when someone selects categories in 
your box, it corresponds to the same POST variables getting submitted 
as when they use the existing Categories edit section.

Removing the existing tags/categories boxes is easy -- you don't need 
a plugin. Just click on "Screen Options" when you are on the Post Edit 
screen, and un-check the Tags and Categories boxes.

Good luck!

    --Jennifer

Ryan Boren wrote:
> On Tue, Apr 28, 2009 at 2:36 PM, Eduardo Wosiack Zulian
> <eduardo at ethymos.com.br> wrote:
>> Probably this is my first message in this list, so hello to you all!
>>
>> Well, I'm working in a project for a Non-Governamental Organization, and
>> like most of the NGOs around the world, they have a lot of texts, articles,
>> cases and campaings, wich will result in a big process of categorization. My
>> ideia is to add more category boxes (as you can see here
>> http://wordpress.org/support/topic/233789?replies=2) in the Add / Edit Post
>> panels to help me - and them, specially - organise all the content,
>> separating each one of my main categories in different boxes / tags. I've
>> managed to hack edit-form-advanced.php for testing, but I don't want do do
>> that.
>>
>> So, my questions: is there a good way to manage this without hacking into
>> edit-form-advanced.php? Yes, I'm planning a plugin, but God, my head's a
>> mess theses days and I can't think clearly anymore. Should I remove
>> post_categories_meta_box and create my own with add_meta_box? Corrections,
>> suggestions and enlightenments will be much appreciated.
> 
> WP 2.8 (not yet released) will show boxes for all defined tag
> taxonomies. If you use register_taxonomy() to define new
> non-hierarchical taxonomies, they will show on the edit screen.
> Unfortunately, this is not yet done for hierarchical taxonomies like
> post categories.  If you want to show multiple hierarchical taxonomies
> on the edit screen you have to add the UI yourself. I think there are
> some plugins that do this. Maybe this one:
> http://wordpress.org/extend/plugins/custom-taxonomies/

-- 
Jennifer Hodgdon * Poplar ProductivityWare
www.poplarware.com
Drupal, WordPress, and custom Web programming