Ajax

Step #1 - Create a Custom Post Type for FAQ

In this example I'm going to create a Custom Post Type named FAQ, but it could be anything You want. Please care about the taxonomy's slug in this case "faq_cat". You need to change it to Your custom slug.

Copy this code in functions.php

Step #2 - Create some taxonomies for FAQ Custom Post Type

Step #3 - Create some posts in FAQ

You can download the XML file from the demo to import.

Step #4 - Enqueue scripts in functions.php

Step #5 - Build the filter

Create a file named filter-terms.php

Step #1 - Enqueue scripts in functions.php