How to display category and list - php

Question

I'm new to php and mysql. I want to display the category and it's list. And I want it to happen like this. Please help me. I'm really stuck to it.
My Database table:
How it is now:
How I need it
Book
Math
Physics
Gadget
Cellphone
Laptop
Power Bank
My code:
$getitems = mysql_query("SELECT category,
name
FROM items_for_checking
WHERE status = 'approved' ");
$numrows = mysql_num_rows($getitems);
if($numrows > 0){
$row = mysql_fetch_assoc($getitems);
$category = $row['category'];
$name = $row['name'];
$last = $category;
echo "<div class='cat'>
<div class='cat-head'>
CATEGORY
</div>
<div class='main-cat'>
<li>$category<li>
<ul>
</div>
</div>
</div>";
while($row = mysql_fetch_assoc($getitems)){
$category = $row['category'];
$name = $row['name'];
if($last != $category){
echo "</ul><li>$category</li><ul>";
}
echo "<li>$name</li>";
$last = $category;
}
echo "</ul>";
}

Answer 1

get the unique category list of array,as like this
$row = mysql_fetch_assoc($getitems);
$uniqueCategory = array_unique($row['category']);
$uniqueCategoryCount=count($uniqueCategory);
for($i=0;$i< $uniqueCategoryCount;$i++)
{
echo "</ul><li>$uniqueCategory[$i]</li><ul>";
while($row = mysql_fetch_assoc($getitems)){
$category = $row['category'];
$name = $row['name'];
if($uniqueCategory[i]==$row['category']){
echo "<li>$name</li>";
}
}
}