使用CSS使父div与父div无关

.cat_p{
    float:left; 
    margin-right:3px; 
    margin-bottom: 1px;}
.cat_p a {
    background: #00A1E0;
    color: #FFFFFF;
    display: inline-block;
    margin-bottom: 2px;
    margin-left: 0px;
    padding: 1px 7px;
    text-decoration: none;
    transition: all 0.3s ease 0s;
} 
.cat_p a:hover{
    background:  #666; 
    color:#fff;
}
.cat_p{
    float:left; 
    margin-right:3px;