在wordpress中为ul添加类 _WordPress主题

我是wordpress主题的新手。我正在尝试显示导航菜单

< div class="nav-collapse" id="collapse"> < ul class="nav nav-pills"> < li > < a href="http://www.srcmini.com/index.php"> Home< /a> < /li> < li > < a href="http://www.srcmini.com/facilities.php"> Facilities< /a> < /li> < li > < a href="http://www.srcmini.com/tariff.php"> Rooms & amp; Tariff< /a> < /li> < li > < a href="http://www.srcmini.com/bookings.php"> Booking< /a> < /li> < li > < a href="http://www.srcmini.com/contact.php"> Contact< /a> < /li> < /ul> < /div> < !-- /.nav-collapse -->

为此, 我已经在functions.php中注册了菜单

function heritage_register_theme_menu() { register_nav_menu( 'primary', 'Main Navigation Menu' ); } add_action( 'init', 'heritage_register_theme_menu' );

并在header.php中添加了菜单：

$defaults = array( 'theme_location'=> '', 'menu'=> '', 'container'=> 'div', 'container_class' => 'nav-collapse', 'container_id'=> '', 'menu_class'=> 'nav nav-pills', 'menu_id'=> '', 'echo'=> true, //'fallback_cb'=> false, 'before'=> '', 'after'=> '', 'link_before'=> '', 'link_after'=> '', 'items_wrap'=> '< ul id="%1$s" class="%2$s"> %3$s< /ul> ', 'depth'=> 0, 'walker'=> '' ); wp_nav_menu( $defaults );

但是在我检查的源代码中, HTML显示为：

< div class="nav nav-pills"> < ul> < li class="page_item page-item-9"> < a href="http://localhost/projects/wordpress/?page_id=9"> PHP Developer< /a> < /li> < li class="page_item page-item-2"> < a href="http://localhost/projects/wordpress/?page_id=2"> Sample Page< /a> < /li> < /ul> < /div>

所以我想知道：