<?php
/** removes the parentheses () from facet counts. Could also be used to replace with alternate bracketing or other output **/
add_filter( 'facetwp_facet_html', function( $output, $params ) {
if ( 'my_facet_name' == $params['facet']['name'] ) {
$output = preg_replace( '/\(|\)/','', $output );
}
return $output;
}, 10, 2 );