Alphabet Woocommerce Tags

woo-tags.php

<?php function alpha_brands(){
    $num = range(0, 9);
    $alpha = range('A','Z');
    $abc_cyr = array();
    foreach(range(chr(0xC0), chr(0xDF)) as $b) $abc_cyr[] = iconv('CP1251', 'UTF-8', $b);

    $characters = array_merge($num, $alpha, $abc_cyr);
    $result = array();
    $t_args = array(
        'hide_empty' => 0
    );
    $terms = get_terms('product_tag', $t_args);
    ob_start();
    if ( !empty( $terms ) && !is_wp_error( $terms ) ) {
        foreach($characters as $val){
            foreach($terms as $term){
                if(stripos(strtolower($val), strtolower(mb_substr($term->name, 0, 1))) !== FALSE){
                    $result[$val][] = $term;
                }
            }
        }
        echo '<div class="shop_grid brands"><ul class="grid">';
        foreach($result as $key => $trm) { ?>
            <li class="grid-item" data-letter="<?php echo $key; ?>">
                <div>
                <?php foreach($trm as $t) { ?>
                    <a href="<?php echo get_term_link($t); ?>"><?php echo $t->name; ?></a>
                <?php } ?>
                </div>
            </li>
            <?php }
        echo '</ul></div>';
    }
    $brands = ob_get_contents();
    ob_clean();

    return $brands;
}
add_shortcode('brands', 'alpha_brands');