Regsiter Custom Post Types - Taxonomies - Add Taxonomies Column (with Dropdown Sorting) in admin to sort data

custom-tab-type-with-column.php

<?php
/* Starts: Register Custom Post Type for tab management */

function tab_type_post() {
	$labels = array(
		'name'               => _x( 'Tab-Posts', 'post type general name' ),
		'singular_name'      => _x( 'Tab-Post', 'post type singular name' ),
		'add_new'            => _x( 'Add New', 'book' ),
		'add_new_item'       => __( 'Add New Tab-Post' ),
		'edit_item'          => __( 'Edit Tab-Post' ),
		'new_item'           => __( 'New Tab-Post' ),
		'all_items'          => __( 'All Tab-Posts' ),
		'view_item'          => __( 'View Tab-Post' ),
		'search_items'       => __( 'Search Tab-Posts' ),
		'not_found'          => __( 'No Tab-Posts found' ),
		'not_found_in_trash' => __( 'No Tab-Posts found in the Trash' ), 
		'parent_item_colon'  => '',
		'menu_name'          => 'Tab-Posts'
	);
	$args = array(
		'labels'        => $labels,
		'description'   => 'Holds our Tab-Posts and Tab-Post specific data',
		'public'        => true,
		'menu_position' => 5,
		'publicly_queryable' => true,
		'query_var' => true,
		// 'rewrite' => array('slug' => 'tabs'),
		'supports'      => array( 'title', 'editor', 'thumbnail' , 'custom-fields' , 'post-formats' ),
		'has_archive'   => true,
	);
	register_post_type( 'tab_posts', $args );	
}
add_action( 'init', 'tab_type_post' );

// hook into the init action and call create_book_taxonomies when it fires
add_action( 'init', 'create_tab_taxonomies', 0 );

/* ====Create two taxonomies, Tab Types and writers for the post type "book======= " */
function create_tab_taxonomies() {
	// Add new taxonomy, make it hierarchical (like categories)
	$labels = array(
		'name'              => _x( 'Tab Types', 'taxonomy general name' ),
		'singular_name'     => _x( 'Tab Type', 'taxonomy singular name' ),
		'search_items'      => __( 'Search Tab Types' ),
		'all_items'         => __( 'All Tab Types' ),
		'parent_item'       => __( 'Parent Tab Type' ),
		'parent_item_colon' => __( 'Parent Tab Type:' ),
		'edit_item'         => __( 'Edit Tab Type' ),
		'update_item'       => __( 'Update Tab Type' ),
		'add_new_item'      => __( 'Add New Tab Type' ),
		'new_item_name'     => __( 'New Tab Type' ),
		'menu_name'         => __( 'Tab Type' ),
	);

	$args = array(
		'hierarchical'      => true,
		'labels'            => $labels,
		'show_ui'           => true,
		'show_admin_column' => true,
		'query_var'         => true
		// 'rewrite'           => array( 'slug' => 'Tab Type' ),
	);

	register_taxonomy( 'tab_type', array( 'tab_posts' ), $args );
}

/* =====Add Tab type column to identify in admin which tab_posts related to which tab_types in list==== */
add_action("manage_posts_custom_column",  "show_destinations_column");
add_filter("manage_edit-tab_posts_columns", "tab_columns");

function tab_columns($columns){
  $columns = array(
    "cb" => "<input type=\"checkbox\" />",
    "title" => "Title",
    "tab_type" => "Tab Type",
	'date' => 'Date',
   );

  return $columns;
}
function show_destinations_column($column){
  global $post;

  switch ($column) {
    case "tab_type":
	  $term_list = get_the_term_list($post->ID,'tab_type','',', ','');
	  echo strip_tags($term_list); // Dont want to show links
      break;
  }
}

/* Add a tab_type drop down in Tab list in admin as well. Easy to select all tabs under that tab category */
function restrict_tabs_by_types() {
		global $typenow;
		$post_type = 'tab_posts'; // change HERE
		$taxonomy = 'tab_type'; // change HERE
		if ($typenow == $post_type) {
			$selected = isset($_GET[$taxonomy]) ? $_GET[$taxonomy] : '';
			$info_taxonomy = get_taxonomy($taxonomy);
			wp_dropdown_categories(array(
				'show_option_all' => __("Show All {$info_taxonomy->label}"),
				'taxonomy' => $taxonomy,
				'name' => $taxonomy,
				'orderby' => 'name',
				'selected' => $selected,
				'show_count' => true,
				'hide_empty' => true,
			));
		};
	}

	add_action('restrict_manage_posts', 'restrict_tabs_by_types');

	function convert_id_to_term_in_query($query) {
		global $pagenow;
		$post_type = 'tab_posts'; // change HERE
		$taxonomy = 'tab_type'; // change HERE
		$q_vars = &$query->query_vars;
		if ($pagenow == 'edit.php' && isset($q_vars['post_type']) && $q_vars['post_type'] == $post_type && isset($q_vars[$taxonomy]) && is_numeric($q_vars[$taxonomy]) && $q_vars[$taxonomy] != 0) {
			$term = get_term_by('id', $q_vars[$taxonomy], $taxonomy);
			$q_vars[$taxonomy] = $term->slug;
		}
	}

	add_filter('parse_query', 'convert_id_to_term_in_query');
?>