Как сделать так, чтобы после нажатия на пункт меню страница прокручивалась до якоря и меню закрывалось?

body {
 position: relative;
 overflow-x: hidden;
}
body,
html { height: 100%;}
.nav .open > a, 
.nav .open > a:hover, 
.nav .open > a:focus {background-color: transparent;}
/* Wrappers */
#wrapper {
 padding-left: 0;
 -webkit-transition: all 0.5s ease;
 -moz-transition: all 0.5s ease;
 -o-transition: all 0.5s ease;
 transition: all 0.5s ease;
}
#wrapper.toggled {
 padding-left: 220px;
}
#sidebar-wrapper {
 z-index: 1000;
 left: 220px;
 width: 0;
 height: 100%;
 margin-left: -240px;
 overflow-y: auto;
 overflow-x: hidden;
 background: #1a1a1a;
 -webkit-transition: all 0.5s ease;
 -moz-transition: all 0.5s ease;
 -o-transition: all 0.5s ease;
 transition: all 0.5s ease;
}
#sidebar-wrapper::-webkit-scrollbar {
 display: none;
}
#wrapper.toggled #sidebar-wrapper {
 width: 220px;
}
#page-content-wrapper {
 width: 100%;
 padding-top: 70px;
}
#wrapper.toggled #page-content-wrapper {
 position: absolute;
 margin-right: -220px;
}
/* Sidebar nav styles */
.sidebar-nav {
  font-family: 'Montserrat', sans-serif;
 position: absolute;
 top: 0;
 width: 230px;
 margin: 0;
 padding: 0;
 list-style: none;
}
.sidebar-nav li {
 position: relative; 
 line-height: 20px;
 display: inline-block;
 width: 100%;
}
.sidebar-nav li:before {
 content: '';
 position: absolute;
 top: 0;
 left: 0;
 z-index: -1;
 height: 100%;
 width: 3px;
 background-color: #1c1c1c;
 -webkit-transition: width .2s ease-in;
 -moz-transition: width .2s ease-in;
 -ms-transition: width .2s ease-in;
 transition: width .2s ease-in;
 
}
.sidebar-nav li:first-child a {
 color: #fff;
 background-color: #1a1a1a;
}
.sidebar-nav li:nth-child(2):before {
 background-color: #ec1b5a; 
}
.sidebar-nav li:nth-child(3):before {
 background-color: #79aefe; 
}
.sidebar-nav li:nth-child(4):before {
 background-color: #314190; 
}
.sidebar-nav li:nth-child(5):before {
 background-color: #279636; 
}
.sidebar-nav li:nth-child(6):before {
 background-color: #7d5d81; 
}
.sidebar-nav li:nth-child(7):before {
 background-color: #ead24c; 
}
.sidebar-nav li:nth-child(8):before {
 background-color: #2d2366; 
}
.sidebar-nav li:nth-child(9):before {
 background-color: #35acdf; 
}
.sidebar-nav li:nth-child(10):before {
 background-color: #279636; 
}
.sidebar-nav li:nth-child(11):before {
 background-color: #7d5d81; 
}
.sidebar-nav li:nth-child(12):before {
 background-color: #279636; 
}
.sidebar-nav li:nth-child(13):before {
 background-color: #79aefe; 
}
.sidebar-nav li:hover:before,
.sidebar-nav li.open:hover:before {
 width: 100%;
 -webkit-transition: width .2s ease-in;
 -moz-transition: width .2s ease-in;
 -ms-transition: width .2s ease-in;
 transition: width .2s ease-in;
 
}
.sidebar-nav li a {
 display: block;
 color: #ddd;
 text-decoration: none;
 padding: 10px 15px 10px 30px; 
}
.sidebar-nav li a:hover,
.sidebar-nav li a:active,
.sidebar-nav li a:focus,
.sidebar-nav li.open a:hover,
.sidebar-nav li.open a:active,
.sidebar-nav li.open a:focus{
 color: #fff;
 text-decoration: none;
 background-color: transparent;
}
.sidebar-nav > .sidebar-brand {
 height: 70px;
 font-size: 11px;
 line-height: 44px;
 font-family:  TransgenderGrotesque-Book;
}
.sidebar-nav .dropdown-menu {
 position: relative;
 width: 100%;
 padding: 0;
 margin: 0;
 border-radius: 0;
 border: none;
 background-color: #222;
 box-shadow: none;
}
/* Hamburger-Cross */
.hamburger {
 position: fixed;
 top: 20px; 
 z-index: 999;
 display: block;
 width: 32px;
 height: 32px;
 margin-left: 15px;
 background: transparent;
 border: none;
}
.hamburger:hover,
.hamburger:focus,
.hamburger:active {
 outline: none;
}
.hamburger.is-closed:before {
 content: '';
 display: block;
 width: 100px;
 font-size: 14px;
 color: #696969;
 line-height: 32px;
 text-align: center;
 opacity: 0;
 -webkit-transform: translate3d(0,0,0);
 -webkit-transition: all .35s ease-in-out;
}
.hamburger.is-closed:hover:before {
 opacity: 1;
 display: block;
 -webkit-transform: translate3d(-100px,0,0);
 -webkit-transition: all .35s ease-in-out;
}
.hamburger.is-closed .hamb-top,
.hamburger.is-closed .hamb-middle,
.hamburger.is-closed .hamb-bottom,
.hamburger.is-open .hamb-top,
.hamburger.is-open .hamb-middle,
.hamburger.is-open .hamb-bottom {
 position: absolute;
 left: 0;
 height: 4px;
 width: 100%;
}
.hamburger.is-closed .hamb-top,
.hamburger.is-closed .hamb-middle,
.hamburger.is-closed .hamb-bottom {
 background-color: #696969;
}
.hamburger.is-closed .hamb-top { 
 top: 5px; 
 -webkit-transition: all .35s ease-in-out;
}
.hamburger.is-closed .hamb-middle {
 top: 50%;
 margin-top: -2px;
}
.hamburger.is-closed .hamb-bottom {
 bottom: 5px; 
 -webkit-transition: all .35s ease-in-out;
}
.hamburger.is-closed:hover .hamb-top {
 top: 0;
 -webkit-transition: all .35s ease-in-out;
}
.hamburger.is-closed:hover .hamb-bottom {
 bottom: 0;
 -webkit-transition: all .35s ease-in-out;
}
.hamburger.is-open .hamb-top,
.hamburger.is-open .hamb-middle,
.hamburger.is-open .hamb-bottom {
 background-color: #696969;
}
.hamburger.is-open .hamb-top,
.hamburger.is-open .hamb-bottom {
 top: 50%;
 margin-top: -2px; 
}
.hamburger.is-open .hamb-top { 
 -webkit-transform: rotate(45deg);
 -webkit-transition: -webkit-transform .2s cubic-bezier(.73,1,.28,.08);
}
.hamburger.is-open .hamb-middle { display: none; }
.hamburger.is-open .hamb-bottom {
 -webkit-transform: rotate(-45deg);
 -webkit-transition: -webkit-transform .2s cubic-bezier(.73,1,.28,.08);
}
.hamburger.is-open:before {
 content: '';
 display: block;
 width: 100px;
 font-size: 14px;
 color: #696969;
 line-height: 32px;
 text-align: center;
 opacity: 0;
 -webkit-transform: translate3d(0,0,0);
 -webkit-transition: all .35s ease-in-out;
}
.hamburger.is-open:hover:before {
 opacity: 1;
 display: block;
 -webkit-transform: translate3d(-100px,0,0);
 -webkit-transition: all .35s ease-in-out;
}
/* Overlay */
.overlay {
 position: fixed;
 display: none;
 width: 100%;
 height: 100%;
 top: 0;
 left: 0;
 right: 0;
 bottom: 0;
 background-color: rgba(87, 87, 87,.4);
 z-index: 1;
}