Hi Lewis,
That is a tough question to answer because it is a custom WordPress theme.
In other words, it was not designed by Global Domains International, Inc. and being a custom theme made by someone else it's hard to know how yours works in particular.
You really need to contact the person that designed that theme for you, or at the very least contact LightWord support because the theme was adapted from the LightWord theme.
With that said, here is how I -believe- it works and what you can do to fix it.
Lot into your blog's dashboard.
Under "Appearance" look for a tab called "Widgets" and click it.
On the far right hand side of the page should be the widgets currently in use. Open each one and look for the title and link of the broken links and change them.
Now, again that is just a guess and is how many themes work, but since that is a custom theme it is impossible to really know.
Contact the person that designed your theme and ask them.
I truly hope this helps. And yes, I see exactly what you mean. All of the links under your GDI Products and Services section do not work properly. Ouch!
Vincent Parker