If it's for internal viewing only, it's a very simple 1 line code change in CSS.
If it's going external on a hidden url, or to external clients, it's still a 1 line code change in CSS, but there are caveats. The main one being browser support. As long as you view it in Chrome or FF, or a recent IE version (9+), you'll be safe.
Firstly, download Blokk Font from http://blokkfont.com/
If it's internal
If you know how to do it yourself, set the font-family to the newly downloaded blokk font. As you have it on your own machine, it will work no problem in any browser you look at it.
Read more about font-family here : http://www.w3schools.com/cssref/pr_font_font-family.asp
However, rather than set it on single elements (
p, ul, li etc) set it on
body, and it will apply to all text, rather than just single items.
If it's external
Use an attribute of CSS3 called @font-face. It basically 'sends' the font along with your page. There's an issue around using that with copyrights and distributing this freely. I'll let you look into all that, but will definitely do what you are looking for.
Check out : http://www.font-face.com/ for more details.
As I previously mentioned, this only works with recent browser versions.
The bonus with using a purely CSS solution is it will work with JS off if you are also designing a non-JS experience.
Bit of a geeky tech answer, but then I used to be a techy geek!
Hope this helps.
---- EDIT ----
Reading your question again, I'm not sure what I've suggested is what you are after. Your actual question asks for all the text to be removed completely, but your image looks like you are after the Blokk font method as I've outlined above.
If you want to completely get rid of your text so you can design, I would advise against it. Might be a controversial comment, but if you don't know what your content is, how long it is going to be, it might be quite dangerous/costly coming up with a design that won't fit the content. It's easy to line items up in Axure or photoshop or your tool of choice, but then when the real content comes is, it always poses more problems.
For me, both need to go hand in hand. Content and design.