BuddyPress - Get a List of Defined xProfile fields - http://wordpress.stackexchange.com/questions/121634/buddypress-get-a-list-of-defined-xprofile-fields

bp-defined-xprofile-fields.php

<?php
// Xprofile get fileds by group
if ( bp_has_profile( array( 'user_id' => $user_id ) ) ) {
	while ( bp_profile_groups() ) : bp_the_profile_group();
		$group_name = bp_get_the_profile_group_name();
		if ( ( 'Social' == $group_name) && bp_profile_group_has_fields() ) {

			echo '<div id="bb-profile-group-fields">';

			while ( bp_profile_fields() ) : bp_the_profile_field();
				if ( bp_field_has_data() ) :
					$name	 = bp_get_the_profile_field_name();
					$class	 = sanitize_title( $name );
					$value	 = bp_get_the_profile_field_edit_value();
					echo '<a href="' . esc_url( $value ) . '" ><i class="fa fa-' . $class . '" aria-hidden="true"></i></a> ';
				endif;
			endwhile;

			echo '</div>';
		}

	endwhile;
}