Admin Panel Category Sort order Problem

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Hi,

I need Category Sort Order,   ABCD.. in admin panel.But default,  ASCFGZB... etc. not reguler,

for reguler list, i changed
ORDER BY c.cat_order, c.cat_name ASC";   
to
ORDER BY c.cat_order, c.cat_name ABC";

in global.php file.

But i saw that error message in my web site

An unexpected error occured. Please try again later.

How can i resolve that issue ?

Thank you.