您没有说明类别id的来源，也没有说明类别标题的样式，也没有说明帖子标题是否应该链接到单个帖子；因此，只有基本结构：

<?php 
$cat_id = 137; 
    echo \'<div class="category-title">\'.get_category($cat_id)->name.\'</div>;
    $cat_posts = get_posts(array(\'category__in\' => array($cat_id), \'posts_per_page\' =>5));
    if($cat_posts) {
        echo \'<ul class="category-posts">\';
        foreach($cat_posts as $cat_post) {
            echo \'<li class="category-post">\'.get_the_title($cat_post->ID).\'</li>\';
        }
        echo \'</ul>\';
    }
?>