Write the columns in an order, and show them in another one. You can easily change the order of built-in grid columns with .col-md-push-* and .col-md-pull-*modifier classes where * range from 1 to 11.

Example

   
      
      
      
      
   
   
      

         
Heading
         

            
Before Ordering
            

               I am on left
            
            

               I am on right
            
         
         

         

            
After Ordering
            

               I was on left
            
            

               I was on right