<style>
.nav {
background-color: #cd0000;
width:200px;
text-align: center;
padding:10px;
}
.nav-a{
background:skyblue;
display: inline-block;
text-align: left;
}
</style>
</head>
<body>
<div class="nav">
<p href="" class="nav-a">导航航1导航1导航1导航1导航1导航1导航1导航1导航1导航1导航1导航1导航1</p>
</div>
</body>外层设置text-align:center;
内层转成行内块，text-align:left;
OK!