<?php 
    $terms = get_terms( $taxonomies, $args );
    $term_name_array = array();
    foreach($terms as $term){
        $term_name_explode = explode("-",$term->term_name);
            $myterm_name=\'\';
            for($i=0;$i<count($term_name_explode)-2;$i++){
               $myterm_name.=" ".$term_name_explode[$i];
            }
            $myterm_name = ltrim($myterm_name);
        if(in_array($myterm_name,$term_name_array))
            continue;
        $term_name_array[] = $myterm_name;
        ?>
            <li><a href="<?php echo get_term_link($term->term_id)?>"><?php echo $myterm_name;?></a></li>
        <?
    }
?>

我不想回答我自己的问题，但在花了一整天的时间之后，我想我找到了一个更好的方法（或者至少是一个有效的方法）。我确信这是一种更干净的方法来进行pre\\u替换，而且我还没有解决重复术语的问题，所以我将保留这个问题，希望有人能提供更好的答案。

<?php

$terms = wp_get_post_terms($post->ID, \'zip-code\', array("fields" => "all"));
foreach ($terms as $term) {
    $name = $term->name;
    $name = str_replace("-", " ", $name);
    $name = preg_replace(\'/\\b[A-Z]{2}\\b /\', \'\', $name);
    $name = preg_replace("/[0-9]/", "", $name);
        echo \'<li><a href="\'.get_term_link($term->slug, \'zip-code\').\'" title="">\'.$name.\'</a></li>\';
}

?>