首先，您需要获取当前类别，然后获取帖子。所以，试试看

<ul>
<?php
global $post;
$category = get_the_category($post->ID);

$args = array( \'numberposts\' => -1, \'offset\'=> 1, \'category\' => $category );
$myposts = get_posts( $args );
foreach( $myposts as $post ) : setup_postdata($post); ?>
    <li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
<?php endforeach; ?>
</ul>

$title_tagged_posts_query = new WP_Query( array(
    \'tag\' => strtolower( get_the_title() )
) );

while ( $title_tagged_posts_query->have_posts() ) : $title_tagged_posts_query->the_post();
    //Output whatever you want here.
endwhile;