How to change permalink

Hi,
First of all, please make sure that “Listing Slug” field is empty which can be found going Directory Settings >> Listing Settings >> Single Listing and then copy the following code and paste it to your theme’s functions.php file.

function atpdp_remove_slug( $post_link, $post ) {

if ( 'at_biz_dir' != $post->post_type || 'publish' != $post->post_status ) {
return $post_link;
}

$post_link = str_replace( '/' . $post->post_type . '/', '/', $post_link );

return $post_link;
}
add_filter( 'post_type_link', 'atpdp_remove_slug', 10, 2 );

function atpdp_parse_request( $query ) {

if ( ! $query->is_main_query() || 2 != count( $query->query ) || ! isset( $query->query['page'] ) ) {
return;
}

if ( ! empty( $query->query['name'] ) ) {
$query->set( 'post_type', array( 'post', 'at_biz_dir', 'page' ) );
}
}
add_action( 'pre_get_posts', 'atpdp_parse_request' );