add_filter('wpseo_breadcrumb_single_link' ,'change_yoast_single_link', 10 ,2);

$COUNT_OF_ITEM = 0;

function change_yoast_single_link($link_output, $link ){
    global $wp;
    global $COUNT_OF_ITEM;
    // складываем сюда результат сформированного ОДНОГО линка
    $result = array();
    // определяем текущую страницу
    $curr_page = home_url(add_query_arg(array(), $wp->request));

    // проверяем, если текущая страница, то делаем крошку БЕЗ ссылки
    if($link["url"] === $curr_page . "/") {
        $COUNT_OF_ITEM = $COUNT_OF_ITEM + 1;
        $text = $link["text"];

        array_push($result, "<li itemprop=\"itemListElement\" itemscope itemtype=\"https://schema.org/ListItem\"><span itemprop=\"name\">{$text}</span><meta itemprop=\"position\" content=\"{$COUNT_OF_ITEM}\"></li>");
    } else {
        $COUNT_OF_ITEM = $COUNT_OF_ITEM + 1;
        $text = $link["text"];
        $url = $link["url"];

        array_push($result, "<li itemprop=\"itemListElement\" itemscope itemtype=\"https://schema.org/ListItem\"><a rel=\"nofollow\" itemprop=\"item\" title=\"{$text}\" href=\"{$url}\"><span itemprop=\"name\">{$text}</span><meta itemprop=\"position\" content=\"{$COUNT_OF_ITEM}\"></a></li>");
    }

    $html_output = "";

    foreach ($result as $idx=>$crumb) {
        $html_output .= $crumb;
    }

    return $html_output;
}

add_filter('wpseo_breadcrumb_output', 'change_breadcrumb_names1');

function change_breadcrumb_names1($output) {
    $output = str_replace("<span>", "", $output);
    $output = str_replace("</span>", "", $output);
    return $output;
}