Yes, we can help you, but you have to take the first few steps so that we have something to work with.

I don't know of a script that is already written, which specifically changes all instances of 2013 to 2014 in a website, but after reading perlintro, perlretut, perlopentut, and File::Find, you could probably write it yourself. Once you've gotten a start on it, let us know what part you're having trouble with, post some relevant code, and we'll do what we can to help you past the tricky parts. Try to write it as a solution general enough that you'll be able to reuse it next year too.