Icon-Font

Font Awesome
Foundation-Icons

// Register Style
function aef_icon_font() {

	wp_deregister_style( 'font-awesome' );
	wp_register_style( 'font-awesome', 'https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css', false, '4.5.0' );
	wp_enqueue_style( 'font-awesome' );

	wp_deregister_style( 'foundation-icons' );
	wp_register_style( 'foundation-icons', 'http://cdnjs.cloudflare.com/ajax/libs/foundicons/3.0.0/foundation-icons.css', false, '3' );
	wp_enqueue_style( 'foundation-icons' );

}
add_action( 'wp_enqueue_scripts', 'aef_icon_font' );