GEO my WP Modify Taxonomy Drop-down Options

gistfile1.php

<?php
function gmw_modify_search_form_taxonomy_args( $args, $taxonomy, $gmw ) {
	
	// Limit the fuction to a specific form using it's ID.
	if ( 1 !== $gmw['ID'] ) {
		return $args;
	}

	// limit the function to a specific taxonmoy.
	if ( "category" !== $taxonomy->name ) {
		return $args;
	}

	//modify the show_option_all of the taxonomy.
	$args['show_option_all'] = "All Categories";

	//return the modifyed args
	return $args;
}
add_filter( 'gmw_search_form_dropdown_taxonomy_args', 'gmw_modify_search_form_taxonomy_args', 20, 3 );