термины и дочерние посты

sidebar-services.php

 <ul>

            <?php
            $tax = 'services_cat';
            $args = array(
                'taxonomy' => $tax,
                'hide_empty' => false,
            );
            $terms = get_terms( $args );

            foreach ($terms as $term): ?>

                <li class="clearfix">
                    <a href="<?php echo get_term_link($term->term_id , $tax)?>">
                        <img src="<?php the_field('service_thumb', $tax . '_' . $term->term_id)?>">
                        <span><?php echo $term->name; ?></span>
                    </a>
                    
                    <?php
                    if (is_tax($tax,$term->term_id) || has_term($term->term_id,$tax)):
                        $args = array(
                            'post_type' => 'services',
                            'posts_per_page' => -1,
                            'tax_query' => array(
                                array(
                                    'taxonomy' => $tax,
                                    'terms'    => $term->term_id
                                ),
                            ),
                        );
                        $services = new WP_Query( $args );
                        if ( $services->have_posts() ) : ?>
                            <ul>
                                <?php while ( $services->have_posts() ) : $services->the_post(); ?>
                                    <li><a href="<?php the_permalink();?>"><?php the_title();?></a></li>
                                <?php endwhile; ?>
                            </ul>
                        <?php endif; 
                        wp_reset_postdata(); ?>
                        
                    <?php endif; ?>
                </li>
            <?php endforeach; ?>
        </ul>