Please tell me how to write this multi-level linkage code?

Question

I am a novice and I couldn’t find the code for this kind of multi-level linkage on the Internet, so I had to come here for help

The programs are zblog and imperial cms

The page needs to have this kind of multi-level linkage from Taobao

Multi-level linkage requires 1, 2, and 3 in the picture below

How should I write it? Thank you very much

Answer 1

https://www.php.cn/course/882.html

https://www.php.cn/code/4718.html

Realized case of linkage