Hide a Taxonomy in the WordPress Admin Menu

hide-taxonomy-in-admin-menu.php

<?php
/*
 See http://lists.automattic.com/pipermail/wp-hackers/2010-November/036174.html
 Also: http://mikeschinkel.com/websnaps/skitched-20101127-012515.png
 Author: Mike Schinkel
*/

add_action('admin_menu','yoursite_admin_menu');
function yoursite_admin_menu() {
	global $submenu;

	// This needs to be set to the URL for the admin menu section (aka "Menu Page")
	$menu_page = 'edit.php';

	// This needs to be set to the URL for the admin menu option to remove (aka "Submenu Page")
	$taxonomy_admin_page = 'edit-tags.php?taxonomy=test_taxonomy';

	// This removes the menu option but doesn't disable the taxonomy
	foreach($submenu[$menu_page] as $index => $submenu_item) {
		if ($submenu_item[2]==$taxonomy_admin_page) {
			unset($submenu[$menu_page][$index]);
		}
	}
}

add_action('init','yoursite_init');
function yoursite_init() {
	// This is just here to have an example to test with.
	register_taxonomy('test_taxonomy', 'post', array(
		'label' => 'Test Taxonomy',
		'query_var' => 'test_taxonomy',
		'rewrite' => array('slug' => 'test'),
		'public' => true,
		'show_ui' => true,
	) );
}

The below code worked for me Instead of the above.

add_action( 'init', 'unregister_tags' );
function unregister_tags() {
unregister_taxonomy_for_object_type( 'taxonomy_name', 'post_type' );
}