Shoestrap 3 - https://press.codes/forums/topic/search-form-in-secondary-navbar/

functions.php

<?php
// Call child-theme style sheet instead of parent them style.css
function shoestrap_child_theme_stylesheet() {
wp_enqueue_style('shoestrap_child', get_stylesheet_uri(), false, null);
}
add_action('wp_enqueue_scripts', 'shoestrap_child_theme_stylesheet', 110);

//from favoc 11-14-14 is response to http://press.codes/forums/topic/fluid-navbar-in-a-wide-layout-flipping-jumbotron-and-secondary-navbar/

function move_extra_header() {
global $ss_headers;

// remove the Extra Header
remove_action( 'shoestrap_pre_wrap', array( $ss_headers, 'branding' ), 3 );

// add it before the primary navigation
add_action( 'shoestrap_pre_top_bar', array( $ss_headers, 'branding' ), 1 );
}
add_action( 'init', 'move_extra_header' );

//from same post – to flip secondary navbar BEFORE jumbotron

// function replace_secondary_menu() {
// global $ss_menus;

// // remove secondary navbar as added in /framework/bootstrap/includes/class-Shoestrap_Menus.php#L22
// remove_action( 'shoestrap_pre_wrap', array( $ss_menus, 'secondary_navbar' ) );

// // add our new navbar on top of Jumbotron area
// add_action( 'shoestrap_pre_wrap', array( $ss_menus, 'secondary_navbar' ), 1 );
// }
// add_action( 'wp', 'replace_secondary_menu' );

// [date]
function displaydate(){
return date('l, F jS, Y');
}
add_shortcode('date', 'displaydate');
// end date

//Enable shortcodes in widgets
add_filter('widget_text', 'do_shortcode');

// Add in Breadcrumb Trail
function my_custom_pre_main() {
if ( function_exists( 'breadcrumb_trail' ) ) breadcrumb_trail();
}
add_action( 'shoestrap_pre_main', 'my_custom_pre_main' );

//Add search form to secondary nav
add_action( 'shoestrap_pre_wrap', 'custom_secondary_navbar', 1 );
function custom_secondary_navbar() {
	global $ss_settings, $ss_framework, $ss_menus;

	if ( has_nav_menu( 'secondary_navigation' ) ) : ?>

		<?php echo $ss_framework->open_container( 'div' ); ?>
			<header class="secondary navbar navbar-default <?php echo $ss_menus->navbar_class( 'secondary' ); ?>" role="banner">
				<button data-target=".nav-secondary" data-toggle="collapse" type="button" class="navbar-toggle">
					<span class="icon-bar"></span>
					<span class="icon-bar"></span>
					<span class="icon-bar"></span>
				</button>
				<?php
				if ( $ss_settings['navbar_secondary_social'] != 0 ) {
					SS_Framework_Bootstrap::navbar_social_links();
				} ?>
				<nav class="nav-secondary navbar-collapse collapse" role="navigation">
					<?php do_action( 'custom_inside_secondary_nav_start' ); ?>
					<?php wp_nav_menu( array( 'theme_location' => 'secondary_navigation', 'menu_class' => apply_filters( 'shoestrap_nav_class', 'navbar-nav nav' ) ) ); ?>
				</nav>
			</header>
		<?php echo $ss_framework->close_container( 'div' ); ?>

	<?php endif;
}

function custom_searchform_secondary_nav() {
 	global $ss_menus;

	remove_action( 'shoestrap_pre_wrap', array( $ss_menus, 'secondary_navbar' ) );
	remove_action( 'shoestrap_inside_nav_begin', array( $ss_menus, 'navbar_pre_searchbox' ), 11 );
	add_action( 'custom_inside_secondary_nav_start', array( $ss_menus, 'navbar_pre_searchbox' ) );	
}
add_action('init','custom_searchform_secondary_nav');