Also, what do you want to use this feature with? Thread list? Or simply a custom list?
You don't need to list all items on every page load, you can load per letter clicked with ajax using js/jquery as well as other ways. It's possible to do as I have done it myself back in the day but I never published it so I have nothing to link to other than a random simple example i just searched up which could get you started on trying to create that page yourself.
The first thought that I had in mind was to simply use JS to load the items from the server depending on the letter. But I was also thinking that it'd probably be too complicated if he only wanted to make a single Page Node. He wasn't clear about what he was going to use it with.. So yeah, I became unsure as to which path I should lead him. Then I simply assumed that the item list would be custom (meaning, wouldn't be stored anywhere in advance), then I thought that he might as well load all the custom items in page load and do simple JS instead of doing a callback.
This is exactly what I want. A simple xenforo page created without a lot of coding. It will have a list of links sorted alphabetically. Will it be easier to accomplish using wordpress as I have wordpress as my cms.
@IPF Well, if you only want to make a simple page node which contain your own custom list, but have that alphabetical selection thingy, XenForo's Page Node will do. Let me test it out on my board first.