I was curious to see if it’s possible to create tabbed navigation and pass current URL parameter to jade from node.js.

It is in fact doable and fairly easy.

In your node.js server, make sure to pass the current URL variable to the your template:

app.get('/users', function(req, res){
  controller.getUsers( function(error, userData){
     res.render('users.jade',{ locals: {
   	users:userData,
   	currentURL:'/users/' 
        }
     });
  });
});

Then, in your jade template, use the conditionals to check for current URL:

div#nav
      ul
        li 
          if(currentURL == '/trends/')
            a(href='/trends/').current Trends
          else
            a(href='/trends/') Trends
        li
          if(currentURL == '/users/')
             a(href='/users/').current Users
          else
             a(href='/users/') Users
        li
          if(currentURL == '/seeds/')
             a(href='/seeds/').current Seeds 
          else
             a(href='/seeds/') Seeds

And here’s a bonus CSS to create nice tabs as your top nav:

#nav ul{text-align:left;border-bottom:1px solid #ccc; 
list-style-type:none;padding:10px 10px;}
#nav ul li{display:inline;}
#nav ul li a{font-weight:bold;border:1px solid #ccc; 
text-decoration:none;padding:10px 20px;
border-bottom:none;margin-right:5px;
margin-bottom:1px;background-color:#eee}
#nav ul li a.current{background-color:#fff;
border-bottom:1px solid #fff;}
#nav ul li a:hover{color:#000;background-color:#eee;}

And that should create a nice nav bar looking like this: