WordPress的wp_nav_menu是不会为a标签添加额外的属性的，比如class， data等，所以就需要另外添加，那么WordPress如何给a标签添加class和data属性？
在当前使用的WordPress主题的 functions.php 文件中添加以下代码即可：
function xintheme_menu_link_atts( $atts, $item, $args ) {
$atts[\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’class\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’] = \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’nav-link\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’;
$atts[\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’data-link-alt\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’] = $item->title;
return $atts;
}
add_filter( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’nav_menu_link_attributes\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’xintheme_menu_link_atts\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, 10, 3 );
