I would hope that you already know how to use a For loop, so you can use one to go through the Items of the ListView. The loop counter will get you the current item and you can then index its SubItems by the appropriate column index. You can then set the Text property of that subitem to the text you want.
To get that text, you can construct a String from a value based on the loop counter. You can use the integer division operator (\) to get that last number and then concatenate it to the appropriate String.
Before you ask me to write the code for you, you try writing it for yourself. You can simply follow the instructions I've provided and use the MSDN documentation or a web search to find information on anything you don't understand. If you have a good go at it and can't get it to work, post back what you've done and I'll be happy to help you fix it for yourself.
Also, make sure that you do it in stages. Each stage is simple so it's much easier to get each stage done than trying to do the whole thing in one go and getting in a tangle. For instance, start by writing a For loop that can access each item. Next, access the appropriate subitem inside the loop. Next, set the Text of that subitem to a constant value. Finally, set the Text to the actual desired value. Don't move onto any step until you have the previous one working. That way, if something doesn't work at any stage you will know exactly what small part of the code it is in because you know everything else before worked and you can always roll back to that last working state.