只需要在主题的funcations.php文件中增加以下代码，具体是否需要移除哪些菜单可以根据需要自己来注释掉对应的代码

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add_action('admin_menu', 'remove_menus', 102); function remove_menus() { global $submenu;   remove_menu_page( 'edit.php' ); // Posts remove_menu_page( 'upload.php' ); // Media remove_menu_page( 'link-manager.php' ); // Links remove_menu_page( 'edit-comments.php' ); // Comments //remove_menu_page( 'edit.php?post_type=page' ); // Pages remove_menu_page( 'plugins.php' ); // Plugins //remove_menu_page( 'themes.php' ); // Appearance remove_menu_page( 'users.php' ); // Users remove_menu_page( 'tools.php' ); // Tools //remove_menu_page(‘options-general.php’); // Settings   remove_submenu_page ( 'index.php', 'update-core.php' );    //Dashboard->Updates remove_submenu_page ( 'themes.php', 'themes.php' ); // Appearance-->Themes remove_submenu_page ( 'themes.php', 'widgets.php' ); // Appearance-->Widgets remove_submenu_page ( 'themes.php', 'theme-editor.php' ); // Appearance-->Editor remove_submenu_page ( 'options-general.php', 'options-general.php' ); // Settings->General remove_submenu_page ( 'options-general.php', 'options-writing.php' ); // Settings->writing remove_submenu_page ( 'options-general.php', 'options-reading.php' ); // Settings->Reading remove_submenu_page ( 'options-general.php', 'options-discussion.php' ); // Settings->Discussion remove_submenu_page ( 'options-general.php', 'options-media.php' ); // Settings->Media remove_submenu_page ( 'options-general.php', 'options-privacy.php' ); // Settings->Privacy }

参考：Remove Menus in WordPress Admin Menu and Dashboard