我能想到的唯一解决办法是删除、重写、替换元框。
// First remove the original one
function wpse21483_remove_catbox()
{
    remove_meta_box( \'post_categories_meta_box\', \'post\', \'side\' );
}
add_action( \'admin_menu\', \'wpse21483_remove_catbox\' ); // not sure about the hook
function wpse21483_new_catbox()
{
    // re-define - take a look at /wp-admin/include/metaboxes.php
}
// Hook the new one
add_action( \'add_meta_boxes\', \'wpse21483_new_catbox\' );
 <小时>
Edit: 也许您可以在类别下拉列表中使用过滤器
function wpse21483_alter_catbox( $output )
{
    global $current_screen;
    $id = $current_screen->id;
    // abort if not on post screen
    if ( $id !== \'post\' )
        return;
    // search/replace the category
    return $output;
}
add_filter( \'wp_dropdown_cats\', \'wpse21483_alter_catbox\', 10, 1 )