WordPressの管理画面にある「投稿」の名前を変更する方法

<?php
function Change_menulabel() {
global $menu;
global $submenu;
$name = 'ブログ';
$menu[5][0] = $name;
$submenu['edit.php'][5][0] = $name.'一覧';
$submenu['edit.php'][10][0] = '新しい'.$name;
}
function Change_objectlabel() {
global $wp_post_types;
$name = 'ブログ';
$labels = &$wp_post_types['post']->labels;
$labels->name = $name;
$labels->singular_name = $name;
$labels->add_new = _x('追加', $name);
$labels->add_new_item = $name.'の新規追加';
$labels->edit_item = $name.'の編集';
$labels->new_item = '新規'.$name;
$labels->view_item = $name.'を表示';
$labels->search_items = $name.'を検索';
$labels->not_found = $name.'が見つかりませんでした';
$labels->not_found_in_trash = 'ゴミ箱に'.$name.'は見つかりませんでした';
}
add_action( 'init', 'Change_objectlabel' );
add_action( 'admin_menu', 'Change_menulabel' );