How can I do this? I can't find in the files anywhere where this occurs. Please help! And why can't I reply to my own questions in this forum? I'm sure I'll need to make clarifications to this topic!!!
The most generated errors being found on Opencart forum originates from contributed programming. The increased counters are caused by posted redundancies of the same solutions that were already provided prior.
What is the purpose of this alternate linking? Do you still want your site to be functional and take orders (or be navigated) in some capacity, or are you just using your current OpenCart installation as a landing page for the time being while links go to some other server/site?
Not enough information to really point you in a decent enough direction as the intention is too vague.
The way the links are pulled up and populated into OC's nav bar has to do with the php controller file for the header. Something I don't recommend you touch anyhow based on how your question was formulated.
For example, I personally hate OC's nav menu and functionality, and I quite frankly just use a custom menu where I have manually inputted links since I don't sell a lot of things. The only two things I had to do was alter the header.twig page (to include the custom code for my menu and directly input in my links) along with the stylesheet.css file to stylize it as I saw fit. Just make sure you save backup copies of these two files. This way, it's not like you're tampering with OC's core functionality doing this anyhow.