<?php

 function rselemetns_woocommerce_product_categories(){
    $terms = get_terms(array(
        'taxonomy' => 'product_cat',
        'hide_empty' => true,
    ));

    if (!empty($terms) && !is_wp_error($terms)) {
        foreach ($terms as $term) {
            $options[$term->slug] = $term->name;
        }
        return $options;
    }
}