Desplegable categorias

<?php } elseif (is_shop() || is_product_category()) {

      // creo un array con nombre de variable para cada categoria:
      // $ropa = get_term_by('slug', 'ropa', 'product_cat');
      // $ropa_array = (array)$ropa;
      // $ropa_array_id = $ropa_array['term_id'];

      $cat_productos = get_terms('product_cat', 'hide_empty=0');
        foreach ( $cat_productos as $term ) {
           ${$term->slug} = get_term_by('slug', $term->slug, 'product_cat');
           ${$term->slug.'_array'} = (array)${$term->slug};
           ${$term->slug.'_array_id'} =${$term->slug.'_array'}['term_id'];
      };

      // luego genero unos argumentos para cada bloque de nombres que quiero separar

      $args = array(
        'taxonomy'     => 'product_cat',
        'orderby'      => 'name',
        'show_count'   => true,
        'pad_counts'   => false,
        'hierarchical' => true,
        'title_li'     => '',
        'hide_empty'   => 0,
        'show_option_all' => 'Ver todo',
        'exclude'    => array( $ropa_array_id, $seda_array_id )
      );

      $args_seda = array(
        'taxonomy'     => 'product_cat',
        'orderby'      => 'name',
        'show_count'   => true,
        'pad_counts'   => false,
        'hierarchical' => true,
        'title_li'     => '',
        'hide_empty'   => 0,
        'exclude'    => array( $ediciones_array_id, $objetos_array_id, $ropa_array_id )
      );

      $args_ropa = array(
        'taxonomy'     => 'product_cat',
        'orderby'      => 'name',
        'show_count'   => true,
        'pad_counts'   => false,
        'hierarchical' => true,
        'title_li'     => '',
        'hide_empty'   => 0,
        'exclude'    => array( $ediciones_array_id, $objetos_array_id, $seda_array_id )
      );
?>
      <div class="desplegable-cat">
        <a class="" role="button" data-toggle="collapse" href="#collapseExample" aria-expanded="false" aria-controls="collapseExample">
          Categorías
        </a>
        <div class="collapse" id="collapseExample">
          <ul class="catego">
            <?php wp_list_categories( $args ); ?>
            <?php wp_list_categories( $args_seda ); ?>
            <?php wp_list_categories( $args_ropa ); ?>
          </ul>
        </div>
      </div>
    <?php } ?>