<?php 
global $wp_query; 
$cat_ID = get_query_var('cat');
$catnew = $cat_ID;
$args = array(
'cat' => $catnew,
'showposts' => 10,
'child_of' => 0,
'orderby' => meta_value_num,
'meta_key' => views,
);
query_posts($args);
while(have_posts()): the_post();
?>
<li><img <?php the_post_thumbnail( array(60,60) ); ?><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
<?php endwhile; wp_reset_query(); ?>