1st Make a file named javascript.js on the root of your site,when that is done,add the code in it which is given below:
function doal(){var se=document.getElementsByName("type[]");for(var i=0;i<se.length;i++){se[i].value=document.getElementById("seL").value;}}
After that,go to submit file,and edit it,and find:

</script>
</head>
Above It,Add:
<script language="javascript" type="text/javascript" src="javascript.js"></script>
Then Find:

Type
then Add this Code BESIDE IT:
<br/><select id="seL" onchange="doal(this.id);this.blur();" ><option value="" selected="selected">Select</option><?php
foreach($core->allowed_types as $at) {
echo '<option class="'.$at.'" value="'.$at.'">'.$at.'</option>';
}
?></select>
AND CLICK SAVE,AND YOU ARE DONE,ALL CREDITS GOES TO Maniac_