WordPress Website Error Fix

WordPress Website Error Fix
We are a medium sized church with a wordpress website on our own domain. Yesterday I was in the dashboard updating some content and I saw that I had 2 plugins that had available updates. I clicked on upgrade automatically for both (one was a CSS dropdown menu plugin; I can’t remember what the other one was) and the website was gone. When you go to the site, all you see is the theme skin, and this error mssg: “Fatal error: Call to undefined function wp_css_dropdownmenu() in /home/”url”/public_html/wp-content/themes/”url”/header.php on line 55”

WordPress Webservices

WordPress Webservices
Need to integrate webservices with my wordpress site. Ideally the user would register on WordPress and get automatically added to another database that uses this webservice:
http://www.idxbroker.com/support/kb/questions/98/Web+Services
https://idxco.com/services/clientWSDL.php

So 4 fields from my wordpress registration: first name, last name, phone, email get passed to the idxbroker database.

Also require the code and instructions on how to replicate the same solution on other wordpress sites we own.

Open to any other solution that would accomplish the same end result as well.

Clone Print Site

Clone Print Site
Clone http://www.printforchange.com/

online designer( Design online function) for some products, customer account login and artwork recall and shopping cart integrated with Google Checkout or Paypal.

But Design Online we need only for

Letterheads (A4, 210 x 297mm)
Flyers A4(210 x 297mm) and A5 (210 x 148mm) both portrait and landscape
Carbonless Forms A4 (210 x 297mm)

We will need to add more product designers over the next few months under a separate arrangement with yourself.

The designs will be provided by us. Only thing you are doing is the functionality.