Example to filter editor style json style_formats

gistfile1.php

<?php
function capsule_print_data2(){

  /* style dropdown */
	$settings = array();
	$style_formats = array(
		array( 
			'title' => 'Code',
			'inline' => 'code',
		),
		array(
			'title' => 'Clear',
			'block' => 'div',
			'classes' => 'clear'
		),
		array(
			'title' => 'Info Boxes'
		),
	);
	$settings['style_formats'] = json_encode( $style_formats );

	/* new */
	$add_style_formats = array(
		array(
			'title' => 'Buttons'
		),
		array(
			'title' => 'White',
			'inline' => 'span',
			'classes' => 'button'
		),
	);

	/* merge */
	$old_style =  json_decode( $settings['style_formats'], true );
	$new_style = array_merge( $add_style_formats, $old_style );
	$new_settings = $settings;
	$new_settings['style_formats'] = json_encode( $new_style );;

	ccdd( $settings, '$settings' );
	ccdd( $add_style_formats, '$add_style_formats' );
	ccdd( $new_style, '$new_style' );
	ccdd( $new_settings, '$new_settings' );
}