Fix PHP code and make integration with CRM

There is a website that is hosted on wordpress, but some of the code is written in PHP - https://laguna26.ru/

You need to make the following edits:

- Customize the navigation buttons (There are 8 buttons that lead to the wrong booking page)
- Make a custom cart page (Already some sketches are in the code)
- Make a payment confirmation/rejection page
- Change logo and favicon
- Add a separate "Hostels" page on the booking page
- Make integration with our CRM-system (What specific methods need to be integrated, I will write in person)

Pay for the work is fixed. You need to do everything before Friday evening