cat+tag filter

function tag_options($type){
  global $ctf_options, $current_tag;
if(is_category){
$category = get_the_category();
            $cat_ID = $category[0]->cat_ID;

  $args = array(
    'cat'      => $cat_ID
);
query_posts($args);
    if(have_posts()): while (have_posts()) : the_post();
        $all_tag_objects = get_the_tags();
        if($all_tag_objects){
            foreach($all_tag_objects as $tag) {
                if($tag->count > 0) {$all_tag_ids[] = $tag -> term_id;}
            }
        }
    endwhile;endif;
    $tags = array_unique($all_tag_ids);
}else{
  $tags = get_tags();
}
  if ($type == 1){
   $options .= '<ul>';
  foreach ($tags as $tag) {
    $post_tag = get_term($tag, 'post_tag');
   $options .= '<li>';
    $options .= '<input type="checkbox" name="';
    $options .= "tag[]";
    $options .= '" value="' . $post_tag->slug . '"';
    if (is_array($current_tag)) {if (in_array($post_tag->slug, $current_tag)) $options .= ' checked ';}
    $options .= '>';
    $options .= $post_tag->name;
    if ($ctf_options['tags_count'] == 1) $options .= ' (' . $post_tag->count . ')';
    $options .= '</li>';
  }
  $options .= '</ul>';
  }
  else {

 $options .= '<select name="' . "tag[]" . '" id="ctf-tag-select" ><option value="-1">';
  if ($ctf_options['all_tags_text'] != '') $options .= $ctf_options['all_tags_text']; else $options .=__('Any tag', 'cat-tag-filter');
  $options .= '</option>';
  foreach ($tags as $tag) {
  $post_tag = get_term($tag, 'post_tag');
    $options .= '<option value="' . $post_tag->slug . '"';
    if (is_array($current_tag)) {if (in_array($post_tag->slug, $current_tag)) $options .= ' selected="selected" ';}
    $options .= '>';
    $options .= $post_tag->name;
    if ($ctf_options['tags_count'] == 1) $options .= ' (' . $post_tag->count . ')';
    $options .= '</option>';
  }
  $options .= '</select>'; }
  return $options;
}