Change metabox defaults The7

functions.php

function dt_change_metabox_defaults() {

	global $DT_META_BOXES;

	if ( $DT_META_BOXES ) {
		$box_album_options = null;
		//find dt_page_box-album_options
		foreach($DT_META_BOXES as &$value) {
			if ($value['id'] === 'dt_page_box-album_options') {
				$box_album_options = &$value;
				break; // Stop iterating after key has been found
			}
		}
	    if (!isset($box_album_options)) return;
			//find _dt_album_options_open_album
			$box_album_options_open_album = null;
		    $box_album_options_type = null;

		foreach($box_album_options['fields'] as &$value) {
			if ($value['id'] === '_dt_album_options_open_album') {
				$box_album_options_open_album = &$value;
				break; // Stop iterating after key has been found
			}
		}

			//find _dt_album_options_type
		foreach($box_album_options['fields'] as &$value) {
			if ($value['id'] === '_dt_album_options_type') {
				$box_album_options_type = &$value;
				break; // Stop iterating after key has been found
			}
		}
		if (isset($box_album_options_open_album['std'])){
			$box_album_options_open_album['std'] = 'post';
        }
		if (isset($box_album_options_type['std'])){
			$box_album_options_type['std'] = 'photo_scroller';
		}
	}
}
add_action( 'admin_init', 'dt_change_metabox_defaults', 30);