I'm not a Lightroom user, so this might be like the blind leading the blind. You don't say what you've tried already, so if you want more informed help, you might have to say more about what you already know and/or tried and what you are willing to pay for and/or learn to achieve your goals.
Are you familiar with creating web galleries in Lightroom?
Have you researched photo hosting sites (e.g. Adobe Creative Cloud, SmugMug, Picasa/Google +, etc.) and how they can be used with Lightroom?
(For example, see SmugMug: http://help.smugmug.com/customer/portal/articles/93281-how-do-i-upload-from-lightroom-
Alternately, do you own your own web domain for hosting web sites, and are you familiar/comfortable with coding your own HTML?