line where to put the code

Hi guys, please give me a hand on this, I have no idea where to paste the code for add social icon. I have done as 5 different attempts, and place it where you put it, the page breaks (http://kriesi.at/documentation/enfold/custom-social-icons/)
My website is http://www.rvarq.com
Right now I have in the Enfold Child folder Functions.php:

<?php
/*
add_filter('avia_load_shortcodes', 'avia_include_shortcode_template', 15, 1);
function avia_include_shortcode_template($paths)
{
	$template_url = get_stylesheet_directory();
    	array_unshift($paths, $template_url.'/shortcodes/');

	return $paths;

}
*/
add_filter('avf_default_icons','avia_add_custom_icon', 10, 1);
function avia_add_custom_icon($icons)
{
$icons['houzz']	 = array( 'font' =>'houzz', 'icon' => 'ue800');
return $icons;

}

add_filter('avf_social_icons_options','avia_add_custom_social_icon', 10, 1);
function avia_add_custom_social_icon($icons)
{
$icons['houzz'] = 'houzz';
return $icons;

}
// remove img title
add_action('wp_footer', 'ava_custom_script_title');
function ava_custom_script_title(){
?>
<script type="text/javascript">
(function($) {
    $('img').removeAttr('title');
    var a = function() {
		$('.avia-gallery-thumb a').each(function() {
			$(this).removeAttr('title');
		});
	}

    a();
})(jQuery);
</script>
<?php
}