IE support html5shiv | respond js For WP usages

// Put This code into functions.php

function my_theme_ie_support_header() {
    echo '<!--[if lt IE 9]>'. "\n";
    echo '<script src="' . esc_url( get_template_directory_uri() . '/js/html5shiv.js' ) . '"></script>'. "\n";
    echo '<script src="' . esc_url( get_template_directory_uri() . '/js/respond.min.js' ) . '"></script>'. "\n";
    echo '<![endif]-->'. "\n";
}
add_action( 'wp_head', 'my_theme_ie_support_header' );