Change the mobile menu into a mobile friendly menu.

mobile_script.js

jQuery(document).ready(function() {

	jQuery(".builder-module-navigation .menu").addClass("mobile-menu-hidden");
	jQuery(".builder-module-navigation").addClass("mobile");
	
	jQuery(".mobile-menu-hidden").before('<div class="mobile-menu">&#8801; Menu</div>');
	
	jQuery(".mobile-menu").click(function(){
		jQuery(this).next().slideToggle();
	});


	jQuery(".mobile.builder-module-navigation li:has(ul)").click(function(){
		jQuery(".mobile.builder-module-navigation li ul").hide('fast');
		jQuery("ul",this).toggle();
	});

});

style.css

.mobile-menu{
display: none;
}


@media screen and (max-width:767px) { 
/*********************************************
	Mobile Menu
*********************************************/
.mobile-menu {
  color: #4b9eec;
  width: auto;
  font-weight: 700;
  font-size: 1.5rem;
  cursor: pointer;
  display: block;
  padding: .65em 0;
  -webkit-font-smoothing: antialiased;
  -webkit-appearance: none;
  -webkit-transition: all .2s ease-in;
  -moz-transition: all .2s ease-in;
  -o-transition: all .2s ease-in;
  -ms-transition: all .2s ease-in;
  transition: all .2s ease-in;
  text-align: center;
}

.mobile.builder-module-navigation .mobile-menu-hidden {
	display: none;
	margin-bottom: 1em;
}

.mobile .builder-module-navigation-menu-wrapper {
	display: block;
}
.builder-module-navigation-background-wrapper {
	padding: 0;
}
.builder-module-outer-wrapper .mobile.builder-module-navigation {
	padding: 0;
}
.mobile.builder-module-navigation {
	display: block;
	line-height: 1;
	width: 100%;
}
.mobile.builder-module-navigation ul.menu {
	border-bottom: 0;
}
.mobile.builder-module-navigation ul.menu:after {
	visibility: hidden;
	display: block;
	font-size: 0;
	content: " ";
	clear: both;
	height: 0;
}
.mobile.builder-module-navigation ul {
	display: block;
	float: none;
	width: 100%;
	margin: 0;
	padding: 0;
}
.mobile.builder-module-navigation ul * {
	margin: 0;
}
.mobile.builder-module-navigation li {
	padding: 0;
	display: block;
	width: 100%;
	background-color: rgba(255, 255, 255,.8);
}

.mobile.builder-module-navigation li a,
.mobile.builder-module-navigation .current_page_item li a,
.mobile.builder-module-navigation .current-cat li a,
.mobile.builder-module-navigation .current-menu-item li a {
	color: #333333;
	font-size: 1em;
	font-weight: 600;
	text-decoration: none;
	padding: .5em 1em;
	border: 0;
	border-bottom: 1px solid #C9C9C9;
	margin: 0;
	-webkit-font-smoothing: antialiased;
}
.mobile.builder-module-navigation .current_page_item > a,
.mobile.builder-module-navigation .current-cat > a,
.mobile.builder-module-navigation .current-menu-item > a {
	color: #252525;
	background: #F5F5F5;
}
.mobile.builder-module-navigation li a:hover,
.mobile.builder-module-navigation .current_page_item li a:hover,
.mobile.builder-module-navigation .current-cat li a li a:hover,
.mobile.builder-module-navigation .current-menu-item li a:hover {
	color: #252525;
	background: #F5F5F5;
}
/* Second Level */
.mobile.builder-module-navigation li ul {
	background: #FFFFFF;
	border: 0;
	width: 100%;
	left: 0;
	position: relative;
	display: none; 
}

.mobile.builder-module-navigation li li {
	border: 0;
	width: 100%;
}
.mobile.builder-module-navigation li li a,
.mobile.builder-module-navigation .current_page_item li a,
.mobile.builder-module-navigation .current-cat li a,
.mobile.builder-module-navigation .current-menu-item li a {
	float: none;
	font-size: 1em;
	line-height: 1;
	margin: 0;
	padding-left: 2em;
}
.mobile.builder-module-navigation li li a:hover,
.mobile.builder-module-navigation li li a.sfhover {

}
.mobile.builder-module-navigation li ul ul {
	margin: 0;
}
.mobile.builder-module-navigation li:hover ul,
.mobile.builder-module-navigation li li:hover ul,
.mobile.builder-module-navigation li li li:hover ul,
.mobile.builder-module-navigation li li li li:hover ul,
.mobile.builder-module-navigation li li li li li:hover ul,
.mobile.builder-module-navigation li.sfhover ul,
.mobile.builder-module-navigation li li.sfhover ul,
.mobile.builder-module-navigation li li li.sfhover ul,
.mobile.builder-module-navigation li li li li.sfhover ul,
.mobile.builder-module-navigation li li li li li.sfhover ul {
	left: 0;
}

.builder-module-navigation .builder-module-sidebar-outer-wrapper {
  display: none;
}
}