Add Expanded Navigation Menu to Genesis Footer - http://amethystwebsitedesign.com/add-expanded-primary-navigation-menu-to-genesis-footer/

functions.php

<?php //Don't add this line

//* Add support for 3-column footer widgets
// add_theme_support( 'genesis-footer-widgets', 3 );


//* Add support for 1-column footer widgets
add_theme_support( 'genesis-footer-widgets', 1 );

style.css

/* Footer Menu - Add just above the first @media section
--------------------------------------------------------- */

.footer-widgets-1 {
    width: 100%;
}

.footer-widgets-1 .menu > .menu-item {
    border-bottom: 0; /* removes dotted border-bottom */
    display: inline-block;
    float: left;
    font-weight: 700; /* makes first item bold */
    margin-left: 2.564102564102564%; /* column grid margin */
    vertical-align: top; /* aligns items at the top */
    width: 23.076923076923077%; /* column grid for 4 main items */
}

.footer-widgets-1 .menu .menu-item ul {
	display: block; /* expand all the sub-menus */
	margin-top: 6px;
}

.footer-widgets-1 .menu > .menu-item:first-child {
    margin-left: 0; /* removes column grid margin on first top menu item */
}

.footer-widgets-1 .widget li li {
    margin: 0; /* removes indentation on sub-menu items */
}

.footer-widgets-1 .menu .menu-item .menu-item {
    display: block; /* sub-menu items are block */
    font-weight: 300; /* normal weight sub-menu items */
    width: 100%; /* sub-menu items are full width */
}

/* Add the two sections below to the very bottom of your style.css */

@media only screen and (max-width: 1200px) {

    .footer-widgets-1 {
      padding-left: 30px;
      width: 100%;
    } /* add to bottom of 1200px @media section */
  
}

@media only screen and (max-width: 800px) {

    .footer-widgets-1 .menu > .menu-item {
      display: block;
      float: none;
      margin-left: 0;
      width: 100%;
    } /* add to bottom of 800px @media section */

}

/* Use these @media sections for child themes before Genesis 2.1.1 */

/*@media only screen and (max-width: 1139px) { 

    .footer-widgets-1 {
      padding-left: 30px;
      width: 100%;
    }
  
}

@media only screen and (max-width: 767px) { 

    .footer-widgets-1 .menu > .menu-item {
      display: block;
      float: none;
      margin-left: 0;
      width: 100%;
    }

}*/