Hi,

Try to replace the code with this one

add_filter( 'woodmart_use_custom_price_widget', '__return_false', 10 );

And add the following CSS code to the Custom CSS

.filter-widget {
	width:20%!important;
}

div.filters-inner-area > div:nth-child(4n+1) {
  clear: none; 

}

div.filters-inner-area > div:nth-child(5n+1) {
  clear: both; 
}

Regards