wordpress 调取二级和二级下分类的方法

<?php wp_list_cats('sort_column=name&optioncount=0&hierarchical=1&hide_empty=0&child_of=1'); ?>

调取所有二级的方法

<?php
                                
                            $categories =  get_categories('child_of=1&depth=0&hide_empty=0&orderby=id&order=asc');   
                            foreach ($categories as $category) {  
                                $now_cat = $category->term_id;
                                $cat_name = $category->cat_name;
                                $cat_id = $category->cat_ID;
                        ?> 
                            <li id="nav_<?php echo $cat_id; ?>">
    						<a href="<?php echo get_category_link($category); ?>" title="<?php echo $cat_name; ?>" ><?php echo $cat_name; ?> ></a>
    						</li>
						<?php }?>