To highlight current page in WP navigation menu

HighlightCurrentPageWPnav

1. In css file,include this line where
    - nav is the id of <nav> tag, [mentioned my menus in header.php]

      <nav id="nav">
        <?php wp_nav_menu( array( 'theme_location' => 'primary' ) ); ?>
      </nav>


      #nav li.current_page_item a {
       -moz-border-radius: 3px 3px 3px 3px;
        background-color: #82BD42;
        color: #FFFFFF !important;
        padding: 10px;
        text-decoration: none;
      }  
      
2. Change attributes as desired

**From http://stackoverflow.com/questions/5339820/highlight-menu-item-when-viewing-single-post-wordpress?lq=1 by user 
Vijaya Narayanasamy**