functions.php

<?php 

//Imagem Destacada
add_theme_support( 'post-thumbnails' );

// suporte a imagem de cabeçalho
$defaults = array(
	'default-image'          => '',
	'width'                  => 0,
	'height'                 => 0,
	'flex-height'            => false,
	'flex-width'             => false,
	'uploads'                => true,
	'random-default'         => false,
	'header-text'            => true,
	'default-text-color'     => '',
	'wp-head-callback'       => '',
	'admin-head-callback'    => '',
	'admin-preview-callback' => '',
);
add_theme_support( 'custom-header', $defaults );


// suporte a logos
add_theme_support( 'custom-logo' );

/* 
 * Customize Menu Item Classes
 * @author Bill Erickson
 * @link http://www.billerickson.net/customize-which-menu-item-is-marked-active/
 *
 * @param array $classes, current menu classes
 * @param object $item, current menu item
 * @param object $args, menu arguments
 * @return array $classes
 */
function be_menu_item_classes( $classes, $item, $args ) {
	if( 'header' !== $args->theme_location )
		return $classes;
	if( ( is_singular( 'post' ) || is_category() || is_tag() ) && 'Blog' == $item->title )
		$classes[] = 'current-menu-item';
		
	if( ( is_singular( 'code' ) || is_tax( 'code-tag' ) ) && 'Code' == $item->title )
		$classes[] = 'current-menu-item';
		
	if( is_singular( 'projects' ) && 'Case Studies' == $item->title )
		$classes[] = 'current-menu-item';
		
	return array_unique( $classes );
}

add_filter( 'nav_menu_css_class', 'be_menu_item_classes', 10, 3 );

?>