Want more control over the navigation output? This is a great snippet for it. Place this in your functions.php file and edit the PHP for the results you want.

 class description_walker extends Walker_Nav_Menu
{ 
function start_el(&$output, $item, $depth, $args) 
{ 
 
global $wp_query; 
$indent = ( $depth ) ? str_repeat( "\t", $depth ) : ''; 
$class_names = $value = ''; 
$classes = empty( $item->classes ) ? array() : (array) $item->classes; 
$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) ); 
$class_names = '' : '"'; 
$output .= $indent . '
<li id="menu-item-'. $item->ID . '"' . $value . $class_names .'>'; 
$attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : ''; 
$attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : ''; 
$attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : ''; 
$attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : ''; 
 
if($depth != 0) 
{ 
$description = $append = $prepend = ""; 
} 
$item_output = $args->before; 
$item_output .= '<a' . $attributes . '>'; 
$item_output .= $args->link_before .$prepend.apply_filters( 'the_title', $item->title, $item->ID ).$append; 
$item_output .= $description.$args->link_after; 
$item_output .= '</a>'; 
$item_output .= $args->after; 
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ); 
} 
}