Blog theme files are all messed up

In a horrific cut and paste error, I managed to delete what I think were just a few lines of code from my blog page php file… leaving me with this: http://www.miamiweddingsandevents.com/about/blog/

It used to have preview text of each entry showing up, and the same footer as the other pages of the site. Is there a way to restore this if we don’t have it saved somewhere? I put the code through the w3 validator to look for broken tags, but it didn’t help anything.

Please help, pretty desperate to have our blog back.

Thank you.