HI Pietro_2003,
Right now, you’d have to hack the plugin to add that JavaScript collapse/expand behavior. The plugin doesn’t have it at the moment.
I would suggest using the templates to do this. Here’s an article that talks about how to override the detail templates: http://businessdirectoryplugin.com/support-forum/faq/customizing-bd-to-fit-your-theme/
Ok, but thanks for pointing me in the right direction. I’ll ask my go-to-programming-guy if it’s something he can get stuck into.
Cheers.