All filters and hooks should be placed in your active theme’s functions.php file
bsk_pdfm_filter_cat_title
Use this filter to change the category title or title structure. You may use category id to make it only applied for specific category. Default category title structure is as the following:
<h2 class="bsk-pdfm-cat-titile">Category Title</h2>
Example
/**
* Change the text or structure of category title
* @var String $cat_title_structure The default category title structure
* @var Integer $cat_id The category id
* @var String $cat_title The category title
* @return String The new category title structure
*/
add_filter( "bsk_pdfm_filter_cat_title", "change_category_title", 10, 3 );
function change_category_title( $cat_title_structure, $cat_id, $cat_title ) {
return '<h3 class="documentation-title-red">'.$cat_title.'</h3>';
}