comment template

function comment_display($comment, $args, $depth)
{

	if( $comment->comment_approved == 1 )
	{
		$add_style="class='is-comment'";

		if( $depth != 1 )
		{
			$_d = $depth*4;
			$_w = 718 - $_d;
			$add_style="class=**is-reply** style=**position:relative; left:".$_d."; width:$_w;**";
			$add_style = str_ireplace('**', "'", $add_style);
		}

		echo "\n<!-- ------------------------- $comment->comment_ID ---------------------- -->\n";
		echo "\t<div $add_style>\n";
		echo "\t\t<div class='c-id c-item c-first'>".$comment->comment_ID."</div>\n";
		echo "\t\t<div class='c-author c-item'>".$comment->comment_author."</div>\n";
		echo "\t\t<div class='c-text c-item c-last'>".$comment->comment_content."</div>\n";
		echo "\t</div>\n\n";
	}
}

$args = array(	'walker' => null,
				'max_depth' => '',
				'style' => "",
				'callback' => comment_display,
				'end-callback' => "",
				'type' => 'all',
				'page' => '',
				'per_page' => '',
				'avatar_size' => 32,
				'reverse_top_level' => null,
				'reverse_children' => ''
				);

wp_list_comments($args);

wp_list_comments adds the unnecessary tag UL, OL or Div
as I do to stop them from print?