Add this code in WPLMS Child theme functions.php or in WPLMS Customizer plugin wplms_customizer.php



 

add_filter('wplms_course_search_selects','wplms_custom_search_args');
function wplms_custom_search_args($args){
 $args = 'instructors=0&cats=1&level=1';
return $args;
}