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<?php $array = array ( array ( 'cat_id' => 14, 'parent_id' => 2, 'cat_url_title' => '20-a-43m' ), array ( 'cat_id' => 13, 'parent_id' => 2, 'cat_url_title' => '16-a-20n' ), array ( 'cat_id' => 15, 'parent_id' => 3, 'cat_url_title' => '1-a-40m' ), array ( 'cat_id' => 13, 'parent_id' => 2, 'cat_url_title' => '16-a-20m' ), array ( 'cat_id' => 16, 'parent_id' => 3, 'cat_url_title' => '2-a-55m' ), array ( 'cat_id' => 13, 'parent_id' => 2, 'cat_url_title' => '16-b-1m' ), array ( 'cat_id' => 16, 'parent_id' => 2, 'cat_url_title' => '16-a-18m' ), array ( 'cat_id' => 12, 'parent_id' => 2, 'cat_url_title' => '12-a-16m' ) ); usort($array, function($a, $b) { return version_compare($a['cat_url_title'], $b['cat_url_title']); }); var_export($array);

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