首先，你可以foreach 在…内foreach. 事实上，您可以根据服务器配置将循环嵌套到更高的级别。

如果要在该字段中仅使用一个术语，请确保选择Field Type 像Radio 或Select 和Return Value 像Term Object. 在这种情况下，您的代码应该如下所示：

<?php 
if( get_terms(\'shows\') ) {
    foreach( get_terms(\'shows\') as $term ) {
        $topic_term = get_field(\'podcast_topic\', $term); // This should be a Term Object

        // Optional: you can use $topic_term to get ACF data from that selected term
        $topic_custom_thumb = get_field(\'podcast_topic_thumb\', $topic_term);

        echo \'<div class="item \' . esc_attr( $topic_term->slug ) . \' col-4 col-md-3 col-lg-2">\';
        echo \'<a href="\' . get_term_link( $term ) . \'">\'; // You were making the term link in wrong way
        echo wp_get_attachment_image( get_field(\'podcast_category_thumb\', $term), \'thumbnail\', false);
        echo \'</a></div>\';
    }
}
?>

如果您希望选择多个术语作为播客主题字段，则Field Type 应该是Multi Select 或Checkbox. 在这种情况下，使用get_field(). 那么您的代码应该是这样的：

<?php 
if( get_terms(\'shows\') ) {
    foreach( get_terms(\'shows\') as $term ) {
        $topic_terms = get_field(\'podcast_topic\', $term); // This should be an array of Term Objects
        $classes = []; // Let\'s store slugs of each term here
        if( is_array($topic_terms) && !empty($topic_terms) ) {
            foreach( $topic_terms as $topic_term ) {
                $classes[] = $topic_term->slug;
            }
        }
        echo \'<div class="item \' . esc_attr( implode( \' \', $classes ) ) . \' col-4 col-md-3 col-lg-2">\';
        echo \'<a href="\' . get_term_link( $term ) . \'">\'; // You were making the term link in wrong way
        echo wp_get_attachment_image( get_field(\'podcast_category_thumb\', $term), \'thumbnail\', false);
        echo \'</a></div>\';
    }
}
?>

记住，当你Term Object 从…起get_field(), 您还可以使用该对象从该术语中获取ACF数据。第一个代码块中的示例。