Anchor Highlighter is a plugin that adds a class to every anchor on your website whose href link matches the actual URL, this is useful to change the css styling of the current anchor, for example in a menu, or in the archives widget, or in any other use that you could gave it. You can choose the class to add in the settings-> Anchor Highlighter menu
このプラグインをダウンロードして、インストール型 WordPress のインストールに使用できます。