Pinterest style of text - php

Question

I'm creating a news feed site. User can upload text and then it displays the texts below eachother. I want to display all the texts in a way that Pinterest displays pictures. How can I do this?
The code for displaying and getting the text from the database is:
<?php
//connect
mysql_connect("host","username","password") or die(mysql_error());
mysql_select_db("database_name") or die(mysql_error());
//query the database
$getnews = mysql_query("SELECT * FROM news ORDER BY id DESC") or die(mysql_query());
while ($row = mysql_fetch_assoc($getnews))
{
//get data
$id = $row['id'];
$title = $row['title'];
$body = $row['body'];
$date = $row['date'];
echo "
<b>$title posted on $date</b><br>
";
echo nl2br($body);
echo "<hr>
";
}
?>
And the code for posting a text is like:
<?php
//insert category to database
if(isset($_POST['qty'])) {
// Fetch and clean the <select> value.
// The (int) makes sure the value is really a integer.
$qty = (int)$_POST['qty'];
// Create the INSERT query.
$sql = "INSERT INTO `table`(`quantity`)
VALUES ({$qty})";
// Connect to a database and execute the query.
$dbLink = mysql_connect('host', 'username', 'password') or die(mysql_error());
mysql_select_db('database_name', $dbLink) or die(mysql_errno());
$result = mysql_query($sql);
// Check the results and print the appropriate message.
if($result) {
echo "Record successfully inserted!";
}
else {
echo "Record not inserted! (". mysql_error() .")";
}
}
if ($_POST['post'])
{
//get data
$title = $_POST['title'];
$body = $_POST['body'];
//check for existance
if ($title&&$body)
{
mysql_connect("host","username","password") or die(mysql_error());
mysql_select_db("database_name") or die(mysql_error());
$date = date("Y-m-d");
//insert data
$insert = mysql_query("INSERT INTO news VALUES ('','$title','$body','$date')") or die(mysql_error());
die("Your text has been posted!");
}
else
echo "Please fill out your name and text<p>";
}
?>