<main>
<?php $catquery = new WP_Query( 'cat=id' ); ?>
<ul>
<?php while($catquery->have_posts()) : $catquery->the_post(); ?>
<li>
<a href="<?php the_permalink() ?>" rel="bookmark">
<?php the_category(); ?>
</a>
</li>
<?php endwhile;
wp_reset_postdata();
?>
</ul>
</main>$catquery = new WP_Query( 'cat=id' );.
<?php
$categories = get_the_category();
$category_id = $categories[0]->cat_ID;
?><?php
$args = array(
'post_type' => 'post',
'post_status' => 'publish',
'cat' => $category_id,
'posts_per_page' => 5,
);
?><?php
$arr_posts = new WP_Query( $args );
if ( $arr_posts->have_posts() ) :
while ( $arr_posts->have_posts() ) :
$arr_posts->the_post();
?>
<ul>
<li><?php the_title(); ?></li>
<li><?php the_category(); ?></li>
</ul>
<?php
endwhile;
endif;
?>
