<?
    query_posts(array(
    'posts_per_page' => '10',
    'orderby' => 'rand',
    'post_type' => 'katalogas',

));
    if (have_posts()) : while (have_posts()) : the_post();

    ?>
    <?php
$tags = wp_get_post_tags($post->ID);
$count=0; $sep='';
  if ($tags) {
    foreach($tags as $tag) {
    $count++;
      echo '<a href="' . get_term_link( $tag, 'post_tag' ) . '" title="' . sprintf( __( "View all posts in %s" ), $tag->name ) . '" ' . '><span>'. $tag->name.'</span></a>';
      if( $count > 0 ) break; //change the number to adjust the count
    }
  }
?>

    <? endwhile; ?>

<? endif; ?>