Edit in JSFiddle

<div style="position: absolute; top: 20px; left: 30px;">
<div id="cssmenu">
<ul><!------------------------------------------------------------------------->
<li><a href="http://papyrocktest.eklablog.com/">Accueil</a></li>
<!-------------------------------------------------------------------------></ul>
<ul>
<li class="has-sub "><a href="#">Articles</a>
<ul>
<li><a href="#">Product 1 <img style="vertical-align: middle;" src="http://ekladata.com/papyrocktest.eklablog.com/perso/images/img%20video%2001.jpg" alt="" width="100" /></a></li>
<li><a href="#">Product 2</a></li>
<li><a href="#">Product 3</a></li>
<li><a href="#">Product 4</a></li>
</ul>
</li>
</ul>
<ul><!------------------------------------------------------------------------->
<li class="has-sub "><a href="#">Liens</a>
<ul>
<li><a href="http://www.eklablog.com/" target="_blank">Eklablog</a></li>
<li><a href="http://doc.eklablog.com/forums" target="_blank">Forum Eklablog</a></li>
<li><a href="http://papyrock.eklablog.com//" target="_blank">Papyrock</a></li>
<li><a href="http://www.picmonkey.com/" target="_blank">Picmonkey</a></li>
<li><a href="http://www.w3schools.com/" target="_blank">W3Schools</a></li>
</ul>
</li>
<!------------------------------------------------------------------------->
<li class="has-sub "><a href="http://papyrocktest.eklablog.com/contact">Contact</a>
<ul>
<li><a href="http://papyrocktest.eklablog.com/newsletter">Newsletter</a></li>
</ul>
</li>
<!------------------------------------------------------------------------->
<li class="has-sub "><a href="http://papyrocktest.eklablog.com/forum-forum36483">Forum</a>
<ul>
<li><a href="#">Forum 1</a></li>
<li><a href="#">Forum 2</a></li>
<li><a href="#">Forum</a></li>
</ul>
</li>
</ul>
</div>
</div>
/*--------- Menu CSS --------------*/
#cssmenu{ 
    width:500px;height:37px; 
    display:block; padding:0; 
    margin:20px auto;  
    border:1px solid; 
    border-radius:5px; } 
#cssmenu > ul {
    list-style:inside none; 
    padding:0; margin:0;} 
#cssmenu > ul > li {
    list-style:inside none; 
    padding:0; margin:0; 
    float:left; 
    display:block; 
    position:relative;} 
#cssmenu > ul > li > a{ 
    outline:none; 
    display:block; 
    position:relative; 
    padding:12px 20px; 
    font:bold 13px/100% Arial, Helvetica, sans-serif; 
    text-align:center; 
    text-decoration:none; 
    text-shadow:1px 1px 0 rgba(0,0,0, 0.4); } 

#cssmenu > ul > li:first-child > a{
    border-radius:5px 0 0 5px;} 
#cssmenu > ul > li > a:after{ 
    content:''; position:absolute; 
    border-right:1px solid; top:-1px; 
    bottom:-1px; right:-2px; z-index:99; } 
#cssmenu ul li.has-sub:hover > a:after{
    top:0; 
    bottom:0;} 
#cssmenu > ul > li.has-sub > a:before{ 
    content:''; position:absolute; 
    top:18px; 
    right:6px; 
    border:5px solid transparent; 
    border-top:5px solid #fff; } 
#cssmenu > ul > li.has-sub:hover > a:before{top:19px;} 
#cssmenu ul li.has-sub:hover > a{ background:#3f3f3f; border-color:#3f3f3f; padding-bottom:13px; padding-top:13px; top:-1px; z-index:999; } 
#cssmenu ul li.has-sub:hover > ul, #cssmenu ul li.has-sub:hover > div{display:block;} 
#cssmenu ul li.has-sub > a:hover{background:#3f3f3f; border-color:#3f3f3f;} 
#cssmenu ul li > ul, #cssmenu ul li > div{ display:none; width:auto; position:absolute; top:38px; padding:10px 0; background:#3f3f3f; border-radius:0 0 5px 5px; z-index:999; } 
#cssmenu ul li > ul{width:200px;} 
#cssmenu ul li > ul li{display:block; list-style:inside none; padding:0; margin:0; position:relative;} 
#cssmenu ul li > ul li a{ outline:none; display:block; position:relative; margin:0; padding:8px 20px; font:10pt Arial, Helvetica, sans-serif; color:#fff; text-decoration:none; text-shadow:1px 1px 0 rgba(0,0,0, 0.5); } 



#cssmenu, #cssmenu > ul > li > ul > li a:hover{ 
    background:#97c20a; 
    background:-moz-linear-gradient(top,  #97c20a 0%, #8da408 100%);
    background:-webkit-gradient(linear, left top, left bottom, color-stop(0%,#97c20a), color-stop(100%,#8da408)); 
    background:-webkit-linear-gradient(top,  #97c20a 0%,#8da408 100%); 
    background:-o-linear-gradient(top,  #97c20a 0%,#8da408 100%);
    background:-ms-linear-gradient(top,  #97c20a 0%,#8da408 100%); 
    background:linear-gradient(top,  #97c20a 0%,#8da408 100%); filter:progid:DXImageTransform.Microsoft.gradient( startColorstr='#97c20a', endColorstr='#8da408',GradientType=0 ); } 
#cssmenu{border-color:#647306;} 
#cssmenu > ul > li > a{border-right:1px solid #647306; color:#fff;} 
#cssmenu > ul > li > a:after{border-color:#c2f224;} 
#cssmenu > ul > li > a:hover{background:#7fa208;}