HTML:Ex:Getbootstrap.com/components/Button group/Vertical variation

 <button type="button" class="btn btn-default">Button</button>
 <button type="button" class="btn btn-default">Button</button>

   <button id="btnGroupVerticalDrop1-" type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
     Dropdown 
     
   </button>

• <a href="#">Dropdown link</a>
• <a href="#">Dropdown link</a>

 <button type="button" class="btn btn-default">Button</button>
 <button type="button" class="btn btn-default">Button</button>

   <button id="btnGroupVerticalDrop2-" type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
     Dropdown 
     
   </button>

• <a href="#">Dropdown link</a>
• <a href="#">Dropdown link</a>

   <button id="btnGroupVerticalDrop3-" type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
     Dropdown 
     
   </button>

• <a href="#">Dropdown link</a>
• <a href="#">Dropdown link</a>

   <button id="btnGroupVerticalDrop4-" type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
     Dropdown 
     
   </button>

• <a href="#">Dropdown link</a>
• <a href="#">Dropdown link</a>