Question

Here is the problem.
I had a nicely styled navigation. Then I added this side collapsible/expandable tree submenu, and the top navigation bar got distorted.
I know there is some conflict in styling li element for the top navigation and side menu.
I just can’t figure out what exactly it is and how to fix it.
Maybe you will spot it.
Here is the URL:
http://eximi.dreamhosters.com/Hawaii/pkdiet/pkd.php
You can see that the last item on the menu – “Contact us” jumps to the second line, which is not supposed to happen.

This is my CSS relevant to the issue:

/Main navigation/

#menu {
    position: relative;
    float: left;
    margin-left: 132px; 
}

#menu li{
    display:inline;
    height: 33px;
    line-height: 33px;
    text-align: center;
    padding-right: 30px;
    color:#5a5a5a;
    font-family: Tunga, sans-serif;
    font-size: 14px;
}

.menu_item  a:link {
    float: left;
    height: 33px;
    line-height: 33px;
    text-align: center;
    padding-right: 30px;
    color:#5a5a5a;
    font-family: Tunga, sans-serif;
    font-size: 14px;
}

.menu_item  a:visited {
    float: left;
    height: 33px;
    line-height: 33px;
    text-align: center;
    padding-right: 30px;
    color:#5a5a5a;
    font-family: Tunga, sans-serif;
    font-size: 14px;
}

.menu_item a:hover {
    color:#1e1d1d;
}

/* CSS Tree menu styles */
ol.tree
{
    padding: 0 0 0 30px;
    width: 130px;
}
    li 
    { 
        position: relative; 
        margin-left: -15px;
        list-style: none;
    }
    li.file
    {
        margin-left: -1px !important;
    }
        li.file a
        {
            color: #fff;
            padding-left: 21px;
            text-decoration: none;
            display: block;
        }
    li input
    {
        position: absolute;
        left: 0;
        margin-left: 0;
        opacity: 0;
        z-index: 2;
        cursor: pointer;
        height: 1em;
        width: 1em;
        top: 0;
    }
        li input + ol
        {
            background: url(images/toggle-small-expand.png) 40px 0 no-repeat;
            margin: -0.938em 0 0 -44px;
            xdisplay: block;
            height: 1em;
        }
        li input + ol > li { height: 0; overflow: hidden; margin-left: -14px !important; padding-left: 1px; }
    li label
    {
        cursor: pointer;
        display: block;
        padding-left: 17px;
    }

    li input:checked + ol
    {
        background: url(images/toggle-small.png) 40px 5px no-repeat;
        margin: -1.25em 0 0 -44px; 
        padding: 1.563em 0 0 80px;
        height: auto;
    }
        li input:checked + ol > li { height: auto; margin: 0 0 0.125em;}
        li input:checked + ol > li:last-child { margin: 0 0 0.063em;}

Answer 1

My advice would be to set

#toggle
{
    margin-top: 54px;
    float:right;
    /*remove clear:both and margin-right:70px*/
}

#menu {
    position: relative;
    float: left;
    margin-left: 132px; 
    width: 920px; /*in accordance with #wrapper*/
}