To only add the custom search box to the main menu you could pass the second parameter provided by the wp_nav_menu_items filter and check if the theme_location is the primary location:
1 2 3 4 5 6 7 8 | function search_box_function( $nav, $args ) { if( $args->theme_location == 'primary' ) return $nav."<li class='menu-header-search'><form action='http://example.com/' id='searchform' method='get'><input type='text' name='s' id='s' placeholder='Search'></form></li>"; return $nav; } add_filter('wp_nav_menu_items','search_box_function', 10, 2); |
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