Masonry Portfolio No Image URL

Hi guys!

I want to use the masonry portfolio to show my works on my website:
http://graffix.plx.co.il/portfolio/masonry-portfolio/

YET,
I dont want the images to open another post page on click,
I just want them to bring up a lightbox like the Masonry GALLERY does so the user could navigate between the images of the same category.

I prefer to use the Masonry PORTFOLIO and not the gallery because it can be filtered by category tags: http://take.ms/5Mjul

In short, Is it possible to replace the redirect to post feature with lightbox, need to use the portfolio and not the gallery mode to keep the category filtering.

Please help,
Thanks in advance,
Tal.