<li><a href="hakkimizda.php">Hakkımızda</a></li>

bu veya li tagını da kapsayacak şekilde link veriyorum olmuyor.

altta da css kodlarını vereyim. css bilgim çok yok yani edit

/* Navigation
----------------------------------------------------------------------------- */

#nav-container{
    float: left;
    width: 670px;
    height: 40px;
    z-index: 200;
    position: relative;   
    background: #333;
}

#nav-container:after{
    position:absolute;
    bottom:0px; 
    right:0;
    content:".";
    text-indent:-9999px; 
    overflow:hidden;
    display:block;
    width:0px; height:0px;
    border-bottom: 40px solid #fff;
    border-left: 18px solid transparent;
}

#nav-container select{
    display: none;
}

/* MAIN NAVIGATION STYLES
----------------------------------------------------------------------------- */
#nav{
    height: 100%;
    margin:0;
    list-style: none;
    float: left;
    position: relative;
}

#nav li.home{
    padding: 12px 15px 11px 25px;
    background-image: url('../img/menu-icon.png');
    background-repeat:no-repeat;
    background-position: 8px center;
}

#nav li.home:before{
    position:absolute;
    bottom:0px; 
    left:-18px;
    content:".";
    text-indent:-9999px; 
    overflow:hidden;
    display:block;
    width:0px; height:0px;
    border-bottom: 40px solid #333;
    border-left: 18px solid transparent;
}

#nav li.home:hover,
#nav li.home.active{
    background-image:  url('../img/menu-icon-hover.png');
    background-position: 8px center;
    background-repeat: no-repeat;
}

#nav > ul{
    display: block !important;
}

#nav li{
    float: left;
    position: relative;
    padding: 12px 15px 11px 15px; 
    cursor: pointer;
}

#nav li.active a{
    border-right: none;
}

#nav li a{
    float: none;
    display: block;
    font: 12px 'Open Sans', Arial, sans-serif;
    color: #aaa;   
    text-transform: uppercase;
}

#nav li:hover a, 
#nav li.active a{
    color: #fff;
}

/* MAIN NAVIGATION SECOND LEVEL
----------------------------------------------------------------------------- */
#nav li ul{
    display: none;
    position: absolute;	
    padding-top: 2px;
    margin: 0;
    top: 100%;
    left: 0;
    z-index: 100;
}

#nav li ul li{
    border-top: 1px solid #333;
    border-right: 1px solid #444;
    border-left: 1px solid #444;    
    border-bottom: 1px solid #555;
    background: #444;  
}


#nav li ul li a{
    text-transform: none !important;
    font: 11px 'Open Sans', Arial, sans-serif;
    line-height: 12px;
    color: #8f8f8f !important;

    -webkit-transition: none;
    -moz-transition: none;
    -o-transition: none;
    -ms-transition: none;
    transition: none;
}

#nav li ul li:last-child{
    border-bottom: 1px solid #444;
}

#nav li ul li:last-child:hover{
    border-bottom: 1px solid #444;
}

#nav li ul li:hover{
    background: #444;
}

#nav li ul li:hover > a{
    color: #eee !important;
}

#nav li ul li, #nav li ul li a{
    float: none;
}

#nav li ul li a {
    width: 130px;
    display: block;
}

/* MAIN NAVIGATION THIRD LEVEL
----------------------------------------------------------------------------- */
#nav li ul li ul {
    display: none;
}

#nav li ul li:hover ul {
    left: 100%;
    top: -1px;
    padding-top: 0 !important;
    padding-left: 2px;
}