我会用Adding a Taxonomy Filter to Admin List for a Custom Post Type?

我将Frank的代码与Kaiser\'s answer 在那个岗位上。还额外添加了我的一点，添加了帖子类型，将附件上传到这里，作为一个类别。

它产生以下结果：

add_action(
    \'plugins_loaded\',
    array ( WPSE76720_Attachment_Taxonomies::get_object(), \'plugin_setup\' )
);

// BUELTGE/KAISER/RUDOLF
class WPSE76720_Attachment_Taxonomies 
{
    protected static $instance = NULL;
    public $post_type;
    public $taxonomies;

    /**
     * Used for regular plugin work.
     *
     * @wp-hook plugins_loaded
     * @return  void
     */
    public function plugin_setup()
    {
        // Taxonomies filter
        add_action( \'load-upload.php\', array( $this, \'setup\' ) );
        // add taxonmies
        add_action( \'init\', array( $this, \'setup_taxonomies\' ) );
        add_action( \'add_attachment\', array( $this, \'auto_tax\' ), 10, 2 );
    }

    /**
     * Constructor, init the functions inside WP
     *
     * @since   1.0.0
     * @return  void
     */
    public function __construct() {}

    /**
     * Handler for the action \'init\'. Instantiates this class.
     *
     * @since   1.0.0
     * @access  public
     * @return  $instance
     */
    public function get_object() 
    {
        NULL === self::$instance and self::$instance = new self;
        return self::$instance;
    }

    /**
     * Setup Taxonomies
     * Creates \'attachment_tag\' and \'attachment_category\' taxonomies.
     * Enhance via filter `fb_attachment_taxonomies`
     * 
     * @uses    register_taxonomy, apply_filters
     * @since   1.0.0
     * @return  void
     */
    public function setup_taxonomies() 
    {
        $attachment_taxonomies = array();
        // Categories
        $labels = array(
            \'name\'              => __( \'Media Categories\', \'b5f-mc\' ),
            \'singular_name\'     => __( \'Media Category\', \'b5f-mc\' ),
            \'search_items\'      => __( \'Search Media Categories\', \'b5f-mc\' ),
            \'all_items\'         => __( \'All Media Categories\', \'b5f-mc\' ),
            \'parent_item\'       => __( \'Parent Media Category\', \'b5f-mc\' ),
            \'parent_item_colon\' => __( \'Parent Media Category:\', \'b5f-mc\' ),
            \'edit_item\'         => __( \'Edit Media Category\', \'b5f-mc\' ), 
            \'update_item\'       => __( \'Update Media Category\', \'b5f-mc\' ),
            \'add_new_item\'      => __( \'Add New Media Category\', \'b5f-mc\' ),
            \'new_item_name\'     => __( \'New Media Category Name\', \'b5f-mc\' ),
            \'menu_name\'         => __( \'Media Categories\', \'b5f-mc\' ),
        );
        $args = array(
            \'hierarchical\' => TRUE,
            \'labels\'       => $labels,
            \'show_admin_column\' => TRUE,
            \'show_ui\'      => TRUE,
            \'query_var\'    => TRUE,
            \'rewrite\'      => TRUE,
        );
        $attachment_taxonomies[] = array(
            \'taxonomy\'  => \'attachment_category\',
            \'post_type\' => \'attachment\',
            \'args\'      => $args
        );
        $attachment_taxonomies = apply_filters( \'fb_attachment_taxonomies\', $attachment_taxonomies );
        foreach ( $attachment_taxonomies as $attachment_taxonomy ) {
            register_taxonomy(
                $attachment_taxonomy[\'taxonomy\'],
                $attachment_taxonomy[\'post_type\'],
                $attachment_taxonomy[\'args\']
            );
        }
    }

    public function setup()
    {
        add_action( current_filter(), array( $this, \'setup_vars\' ), 20 );
        add_action( \'restrict_manage_posts\', array( $this, \'get_select\' ) );
        add_filter( "manage_taxonomies_for_attachment_columns", array( $this, \'add_columns\' ) );
    }

    public function setup_vars()
    {
        $this->post_type = \'attachment\';
        $this->taxonomies = get_object_taxonomies( $this->post_type );
    }

    public function add_columns( $taxonomies )
    {
        return array_merge(
             $taxonomies
            ,$this->taxonomies
        );
    }

    public function get_select()
    {
        $walker = new WCMF_walker;
        foreach ( $this->taxonomies as $tax )
        {
            wp_dropdown_categories( array(
                 \'taxonomy\'        => $tax
                ,\'hide_if_empty\'   => false
                ,\'show_option_all\' => sprintf(
                     get_taxonomy( $tax )->labels->all_items
                 )
                ,\'hide_empty\'      => false
                ,\'hierarchical\'    => is_taxonomy_hierarchical( $tax )
                ,\'show_count\'      => false
                ,\'orderby\'         => \'name\'
                ,\'selected\'        => \'0\' !== get_query_var( $tax )
                    ? get_query_var( $tax )
                    : false
                ,\'name\'            => $tax
                ,\'id\'              => $tax
                ,\'walker\'          => $walker
            ) );
        }
    }

    /**
     * Add the parent post type as an attachment category
     * 
     * @author Rodolfo Buaiz
     */
    public function auto_tax( $post_id ) 
    {
        $the_p = get_post( $post_id );
        if( $the_p->post_parent > 0 ) 
        {
            $cpt = get_post_type( $the_p->post_parent );
            $term = term_exists( $cpt, \'attachment_category\' );
            if( !$term )
                $term = wp_insert_term( $cpt, \'attachment_category\' );

            wp_set_post_terms( $post_id, $term[\'term_id\'], \'attachment_category\', true );
        }
    }
} // end BUELTGE/KAISER/RUDOLF

// KAISER
class WCMF_walker extends Walker_CategoryDropdown
{
    var $tree_type = \'category\';
    var $db_fields = array(
         \'parent\' => \'parent\'
        ,\'id\'     => \'term_id\'
    );
    public $tax_name;

    /**
     * @see   Walker::start_el()
     * @param  string $output Passed by reference. Used to append additional content.
     * @param  object $term   Taxonomy term data object.
     * @param  int    $depth  Depth of category. Used for padding.
     * @param  array  $args   Uses \'selected\' and \'show_count\' keys, if they exist.
     * @param  int    $id
     * @return void
     */
    function start_el( &$output, $term, $depth, $args, $id = 0 )
    {
        $pad = str_repeat( \' \', $depth * 3 );
        $cat_name = apply_filters( \'list_cats\', $term->name, $term );

        $output .= sprintf(
             \'<option class="level-%s" value="%s" %s>%s%s</option>\'
            ,$depth
            ,$term->slug
            ,selected(
                 $args[\'selected\']
                ,$term->slug
                ,false
             )
            ,"{$pad}{$cat_name}"
            ,$args[\'show_count\']
                ? "&nbsp;&nbsp;({$term->count})"
                : \'\'
        );
    }
}
// end KAISER

我的Media Categories 插件会帮你做到这一点-它甚至会清理媒体模式上的界面，这样你仍然可以得到复选框列表，默认情况下，你只会得到文本字段。