您可以使用has_term条件标签ex：

if( has_term( \'z\', \'product_cat\',$post->ID ) ) {
    ?>
    <div id="post-timer">
        <p class="timebuy">Time Left To Buy:</p>
        <div id="timer-wrap">
            <?php echo do_shortcode( \'[tminus cid ="12" omitweeks="true" days=" " hours=" " minutes=" " seconds=" "/]\' ); ?>
        </div><!--end timer-wrap-->
    </div><!--end post-timer-->
    <?php
}