Depreciation Error

I am running WordPress and vBullentin (integrated together) on my site https://www.azfans.com

Recently it appears that my web host upgraded the PHP. Now I just get errors when trying to access my site. Is there anyway to easily fix these? I’m concerned about upgraded WP since I have many custom templates as well as plug-ins.

I’d appreciate it if someone could provide some advice.

Thank you,

Jon