[рони]

s24344,

<script>
     var str = "/categories/5";
     str = str.match(/[^\/]+/g);
     var o = ["name","id"].reduce(function(obj, el, i) {
     obj[el] = i ? +str[i]  : str[i];
     return obj
},{});
   document.write(JSON.stringify(o, null, 4))
 </script>