We'll create fresh WordPress site with Anchor Highlighter installed. You have 20 minutes to test the plugin after that site we'll be deleted.
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