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$tags = get_tags();
$tag_list = '';
foreach ( $tags as $tag ) {
	$tag_link = get_tag_link( $tag->term_id );

	$tag_list .= $tag->name;
//	$html .= "{$tag->name}</a>";
}
//$html .= '</div>';
echo $tag_list;

$tags = get_tags();
$html = '<div class="post_tags">';
foreach ( $tags as $tag ) {
	$tag_link = get_tag_link( $tag->term_id );

	$html .= "<a href='{$tag_link}' title='{$tag->name} Tag' class='{$tag->slug}'>";
	$html .= "{$tag->name}</a>";
}
$html .= '</div>';
echo $html;