.portfolio-menu {
    text-align: center;
}

.portfolio-menu ul li {
    display: inline-block;
    margin: 0;
    list-style: none;
    padding: 10px 15px;
    cursor: pointer;
    -webkit-transition: all 05s ease;
    -moz-transition: all 05s ease;
    -ms-transition: all 05s ease;
    -o-transition: all 05s ease;
    transition: all .5s ease;
}

.portfolio-item .item {
    /*width:303px;*/
    float: left;
    margin-bottom: 10px;
}