<?php
add_filter( 'facetwp_builder_item_value', function( $value, $item ) {
if ( 'website-link' == $item['settings']['name'] ) { // adjust website-link to name of your layout field https://d.pr/i/gL3rjA
if ( !empty( $value ) ) {
$value = '<a href="' . esc_url( $value ) . '">website</a>';
} else {
$value = '';
}
}
return $value;
}, 10, 2 );