class WP_Custom_Walker extends Walker_Nav_Menu {
    function start_lvl( &$output, $depth = 0, $args = array() ) {
        $indent = str_repeat("\t", $depth);
        $output .= "\n$indent<div class=\"dropdown-menu\" aria-labelledby=\"navbarDropdown\">\n";
    }

    function end_lvl( &$output, $depth = 0, $args = array() ) {
        $indent = str_repeat("\t", $depth);
        $output .= "$indent</div>\n";
    }

    function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
        $indent = ( $depth ) ? str_repeat("\t", $depth) : '';
        $class_names = $value = '';

        $classes = empty( $item->classes ) ? array() : (array) $item->classes;
        $classes[] = 'nav-item';

        if ( in_array('menu-item-has-children', $classes) ) {
            $classes[] = 'dropdown';
        }

        if ( in_array('current-menu-item', $classes) ) {
            $classes[] = 'active';
        }

        $class_names = join(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item));
        $class_names = ' class="' . esc_attr( $class_names ) . '"';

        $id = apply_filters('nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args);
        $id = strlen( $id ) ? ' id="' . esc_attr( $id ) . '"' : '';

        $output .= $indent . '<div' . $id . $value . $class_names .'>';

        $atts = array();
        $atts['title']  = ! empty( $item->attr_title ) ? $item->attr_title : '';
        $atts['target'] = ! empty( $item->target )     ? $item->target     : '';
        $atts['rel']    = ! empty( $item->xfn )        ? $item->xfn        : '';
        $atts['href']   = ! empty( $item->url )        ? $item->url        : '';

        if ( in_array('menu-item-has-children', $classes) ) {
            $atts['class'] = 'nav-link dropdown-toggle';
            $atts['id'] = 'navbarDropdown';
            $atts['role'] = 'button';
            $atts['data-bs-toggle'] = 'dropdown';
            $atts['aria-expanded'] = 'false';
        } else {
            $atts['class'] = 'nav-link';
        }

        if ( in_array('current-menu-item', $classes) ) {
            $atts['class'] .= ' active';
        }

        $atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args );
        $attributes = '';
        foreach ( $atts as $attr => $value ) {
            if ( ! empty( $value ) ) {
                $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
                $attributes .= ' ' . $attr . '="' . $value . '"';
            }
        }

        $item_output = $args->before;
        $item_output .= '<a'. $attributes .'>';
        $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
        $item_output .= '</a>';
        $item_output .= $args->after;

        $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
    }

    function end_el( &$output, $item, $depth = 0, $args = array() ) {
        $output .= "</div>";
    }
}<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://estarartistics.org/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://estarartistics.org/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://estarartistics.org/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://estarartistics.org/wp-sitemap-posts-event-1.xml</loc></sitemap><sitemap><loc>https://estarartistics.org/wp-sitemap-posts-location-1.xml</loc></sitemap><sitemap><loc>https://estarartistics.org/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://estarartistics.org/wp-sitemap-taxonomies-event-categories-1.xml</loc></sitemap><sitemap><loc>https://estarartistics.org/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>