Игорь Воротнёв

<?php if ( get_field( 'air_conditioning' ) ) : ?>
    <li class="field-li">
        <span>Вентиляция и кондиционирование: <?php the_field( 'air_conditioning' ); ?></span>
    </li>
<?php endif; ?>

$args = array(
    'posts_per_page' => -1,
    'post_type' => 'product',
    'tax_query' => array(
        array(
            'taxonomy' => 'product_cat',
            'field' => 'slug',
            'terms' => 'cables'
        ),
    ),  
);

define( 'SITEPATH', '/var/www/sitename/httpdocs' );
...
include( SITEPATH . '/templates/header.php' );
include( SITEPATH . '/templates/footer.php' );

function my_pre_tag_query( $query ) {

	if ( $query->is_admin || ! $query->is_main_query() ) {
		return;
	}

	if ( $query->is_tag() ) {
		$query->set( 'post_type', array( 'post', 'blog' ) );
	}

}
add_action( 'pre_get_posts', 'my_pre_tag_query' );