Collapsing Categories for Sidebar

Hi,

Does anyone know of a plugin that enables you expand and collapse your categories (and pages) like the following website…..

https://uk.hermes.com/webapp/wcs/stores/servlet/CategoryDisplay?storeId=10201&catalogId=10051&langId=-11&categoryId=130042&leftCategoryId=130042&topCategoryId=130042&parentCategoryId=130042&nbItem=0#

I am talking about the sidebar to the left. It is minus the arrows which I like.

Thanks