@ushasj: Hello there,
To use the full width of pages
Go to => Appearance => Customize => Theme Options => Layout Options => Default Layout => Select No Sidebar: Full Width and Publish.
To have portfolio post like in http://www.bridalbliss.com/portfolio
Go to => Appearance => Customize => Theme Options => Portfolio => Enable the section => Select the Type you want to use and select posts and Publish. Also make sure you have selected Select Portfolio Layout as 3 columns.
Let me know if this works out!
Kind Regards,
Skandha