<?php

$this_post_id = get_the_ID();

// Get the all post content in a variable
$posttext = $post->post_content;

$document = DOMDocument::loadHTML($posttext);
$xpath = new DOMXPath($document);

# for each link that has an image inside it, set its href equal to
# the image's src.
foreach ($xpath->query('//a/img/..') as $link) :


    $img = $link->getElementsByTagName('img')->item(0);
    $link_src = $link->getAttribute('href');
    $link_title = $link->getAttribute('title');
    $img_src = $img->getAttribute('src');


    $theImageSrc = $img_src;
    global $blog_id;
    if (isset($blog_id) && $blog_id > 0) {
        $imageParts = explode('/files/', $theImageSrc);
        if (isset($imageParts[1])) {
            $theImageSrc = '/blogs.dir/' . $blog_id . '/files/' . $imageParts[1];
        }
    }

    ?>

    <a href="<?php echo $link_src; ?>" rel="lightbox[<?php echo $this_post_id; ?>]" title="<?php if ($link_title) {
        echo $link_title;
    } else { the_title(); } ?>" class="cboxElement">
    <img class="alignleft" src='<?php echo get_bloginfo('template_directory').'/timthumb.php?src=' . $theImageSrc  . '&h=150&w=150'; ?>' height="150" width="150" alt=""/>
</a>
<?php

endforeach;

?>