nbmblueeye

The Plugin will help you easy to add Custom Taxonomy to your Post, Custom Post Type. 
You just input the post_type and The Name of Taxonomy, 
You should tick to hierarchical option: will become Category or become Tag);
If you want to update, remove the existing taxonomy just go to page MCT_All, this page will be used to manage your added custom taxonomy
Ordered list: 
– Existing Custom Post Type Slug: the slug name from post_type, which is the one you want to add custom taxonomy 
– New Taxonomy Name: the name of Custom Taxonomy, which you want to add. will be display on the admin menu 
– New Taxonomy Slug: add the slug of the custom taxonomy, which you want to add

My Custom Taxonomy

This Plugin will be used to add custom taxonomy onto your Post, Custom Post Type

Alfredo Barbosa

Customizing provides a nice interface for you to create custom post types, taxonomies and fields (meta boxes).
You’ll find the Customizing tools in the ‘Customizing’ menu.
In the ‘Custom Box’ screen, you may show and hide groups of fields, and order them the way you like.
All the settings are based on the WordPress API settings, therefore, the oficial guides apply to them.
<h3>Known Problems</h3>
<ul>
<li>Custom boxes and user boxes won’t work if you have taxonomy terms with quotes.</li>
</ul>

Customizing – Post Types, Taxonomies & Fields

Custom post types, taxonomies and fields for WordPress.

My Custom Taxonomy vs Customizing – Post Types, Taxonomies & Fields