Manage Subscription Lists

I’m using a custom page to Manage Subscriptions. The section that contains the available lists (2 in my case) is all on one line:

Your lists [ ]Doggie Bonez News [ ]New Arrivals to Doggie Bonez

How do I get it to include line breaks between lists, like this:

Your Lists
[ ] Doggie Bonez News
[ ] New Arrivals to Doggie Bonez

Thanks.