How to generate site links in the SERP?
 

Sitelinks are those additional links that appear below the main URL for a particular domain on the SERP. These results are designed to help people better navigate your site by featuring the different areas of your site that might interest them.
The rules are simple:
Use text to create your internal links.
Use proper anchor text.
Build more internal links to the pages you want to appear as sitelinks. In other words, the pages that have many internal links pointing to them, are likely to appear as sitelinks.