In which file should I edit filters in Bitrix?

Question

PHP

there is a site goo.gl/IzxMR9
filters do not work in it, in which file should I edit to configure? Site on Bitrix

Answer 1

in the file where the filter is. PS what a question, such an answer.
The file with the filter can be located anywhere, go to the page where the catalog component is connected, see how the filter is made, by the component or not, if it is a component, look in the site templates.
In general, it's like guessing from a picture, without page listings or links to a file.