A project I was working on recently had a series of sections on a page. They ran in 3’s in that the 1st, 4th, 7th and so on and the 2nd, 5th, 8th (you get the idea!) were styled the same. Therefore I needed a way to add a class to each div which indicated which section it was. Here is how I did it.
I was able to create a loop (we use them a lot in WordPress!) and then use a counter to find out which section were we in, in order to add the correct class. The code I used is below:
You could of course adapt this to suit other patterns of post classes, quite easily.