Custom meta box repeating function (worpress) - repost

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3
Avg Bid (USD)
$158
Project Budget (USD)
$30 - $250

Project Description:
i need only one code alternation in my function php file. i am attaching my function.php.

actually the work is i have created a custom meta box with 2 text field, one text area and one taxonomy (category field) in one meta box. i need this repeat (entire meta box) by a button clicking. this repeating is unlimited or capping in 30 block or so. it will dynamically show on single.php file (result / value)

go through the file and reply me as earlier possible.
here is 3 screenshots, it will explain more what is my need.

Skills required:
CSS, HTML, PHP, Wordpress
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