I'm not sure that this is the right name. The task is this: you need to sort the contents when you click on the menu buttons.
<ul class="mnu-our-work"> <li><a href="#">All</a></li> <li><a href=".branding">Branding</a></li> <li><a href=".design">Design</a></li> <li><a href=".development">Development</a></li> <li><a href=".strategy">Strategy</a></li> </ul> <div class="all-elem"> <div class="all-work design"> ... </div> <div class="all-work strategy"> ... </div> <div class="all-work development"> ... </div> //их к примеру 9 разных div </div> That is, when you click Design. all other divas must become invisible.