LIghtbox2 hide header and footer regions
Not answering directly but proposing an alternative solution here:

If possible, switch to Colorbox, extend it with Colorbox Node and use it to easily display your nodes without header and footer like this:

&lt;a class="colorbox-node" href="blogs/my-example?width=600&amp;height=600"&gt;My Example&lt;/a&gt;