Code for Adding Font Awesome social icons to WordPress Custom Menus using Genesis Hooks - this file is dependent upon the use of the code here in the functions file as well. Source code this is based on from here http://justintadlock.com/archives/2013/08/14/social-nav-menus-part-2

functions.php

<?php

/** Enqueue Font Awesome from CDN if  your theme hasn't already included Font Awesome **/

add_action( 'wp_enqueue_scripts', 'twp_enqueue_awesome' );
/**
 * Register and load font awesome CSS files using a CDN.
 *
 * @link http://www.bootstrapcdn.com/#fontawesome
 * @author The Web Princess
*/
function twp_enqueue_awesome() {
	wp_enqueue_style( 'prefix-font-awesome', '//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css', array(), '4.0.3' );
}


/**
* Set up Social Menu Location  */


function register_my_menu() {
  register_nav_menu('social',__( 'Social Menu' ));
}
add_action( 'init', 'register_my_menu' );
 



/** Add your Social Menu to genesis_header - you can use other hook locations as you wish **/


add_action( 'genesis_header','twp_genesis_add_social', 10 );
/**
* Set up Custom Menu for Social Icons.
 *
 * @link http://thewebprincess.com/new-genesis-social-icon-menu/
 * @author The Web Princess
 *
 * @return null Return early if menu does not exist.
*/

function twp_genesis_add_social() {
	if ( ! has_nav_menu( 'social' ) ) {
		return;
	}
	echo '<h4 class="social-title widgettitle widget-title">Connect</h4>';
	$nav_args = array(
		'theme_location'    => 'social',
		'container'         => 'div',
		'container_id'      => 'menu-social',
		'container_class'   => 'menu menu-social',
		'menu_id'           => 'menu-social-items',
		'menu_class'        => 'menu-items',
		'depth'             => 1,
		'link_before'       => '<span class="screen-reader-text">',
		'link_after'        => '</span>',
		'fallback_cb'       => '',
	);
	wp_nav_menu( $nav_args );
}

style.css

/* Social Menu
--------------------------------------------- */

.screen-reader-text {
	position: absolute;
	top:      -9999em;
	left:     -9999em;
}

.menu-social ul {
	list-style: none;
	margin:     0 0 25px;
	text-align: center;

}

.menu-social ul li {
	display:  inline-block;
	position: relative;
}

.menu-social li a:before {
	content:        '\f005';
	display:        inline-block;
	padding:        0 5px;
	font-family:    'FontAwesome';
	font-size:      16px;
	vertical-align: top;
	-webkit-font-smoothing: antialiased;
}


.menu-social li a[href*="facebook.com"]:before {
	content: '\f09a';
/* 	content: '\f082'; /* facebook-square */
	color:   #3b5998;
}
.menu-social li a[href*="twitter.com"]:before {
	content: '\f099';
/* 	content: '\f081'; /* twitter-square */
	color:   #33ccff;
}
.menu-social li a[href*="plus.google.com"]:before {
	content: '\f0d5';
/* 	content: '\f0d4'; /* google-plus square */
	color: #dd4b39;
}
.menu-social li a[href*="linkedin.com"]:before {
	content: '\f0e1';
	color:   #0e76a8;
}
.menu-social li a[href*="app.net"]:before {
	content: '\f170';
	color:   #706D73;
}
.menu-social li a[href*="bitbucket.com"]:before {
	content: '\f171';
/* 	content: '\f172';  /* bitbucket-square */
}
.menu-social li a[href*="dribbble.com"]:before { 
	content: '\f17d';
 }
.menu-social li a[href*="flickr.com"]:before {
	content: '\f16e';
}
.menu-social li a[href*="foursquare.com"]:before {
	content: '\f180';
}
.menu-social li a[href*="github.com"]:before {
	content: '\f09b';
/*	content: '\f113'; /* github-alt */
/*	content: '\f092'; /* github-square */
}
.menu-social li a[href*="instagram.com"]:before {
	content: '\f16d';
}
.menu-social li a[href*="linkedin.com"]:before {
	content: '\f0e1';
/*	content: '\f08c'; /* linkedin-square */
}
.menu-social li a[href*="pinterest.com"]:before {
	content: '\f0d2';
/*	content: '\f0d3'; /* pinterest-square */
}
.menu-social li a[href*="renren.com"]:before {
	content: '\f18b';
}
.menu-social li a[href*="stack-exchange.com"]:before {
	content: '\f18d';
}
.menu-social li a[href*="stack-overflow.com"]:before {
	content: '\f16c';
}
.menu-social li a[href*="tumblr.com"]:before {
	content: '\f173';
/* 	content: '\f174'; /* tumblr-square */
}
.menu-social li a[href*="vimeo.com"]:before {
	content: '\f194';
}
.menu-social li a[href*="weibo.com"]:before {
	content: '\f18a';
}
.menu-social li a[href*="xing.com"]:before {
	content: '\f168';
/*	content: '\f169'; /* xing-square */
}
.menu-social li a[href*="youtube.com"]:before {
	content: '\f167';				
/*	content: '\f16a';/* youtube-play */
/*	content: '\f166';/* youtube-square */
}