Filter Bar - Template override to hide unwanted filter bar categories when using a dropdown or a checkbox.

checkbox.php

<?php
/**
 * View: Checkbox Component
 *
 * Override this template in your own theme by creating a file at:
 * [your-theme]/tribe/events-filterbar/v2_1/components/checkbox.php
 *
 * See more documentation about our views templating system.
 *
 * @link http://evnt.is/1aiy
 *
 * @var string  $label   Label for the checkbox.
 * @var string  $value   Value for the checkbox.
 * @var string  $id      ID of the checkbox.
 * @var string  $name    Name attribute for the checkbox.
 * @var boolean $checked Whether the checkbox is checked or not.
 *
 * @version 5.0.0
 *
 */
?>
<?php
/* Start Customizations */
// Check if event category AND checkbox
if (
      $data['name'] == 'tribe_eventcategory[]'
      && $data['type'] == 'checkbox'
) {
    // Set up the unwanted categories by label
    $unwanted_category_labels = [
        'C One',
        'C Two',
    ];

    // Bail if the current category is an unwanted one.
    if ( in_array( $data['label'], $unwanted_category_labels) ) {
        return;
    }
}
/* End Customizations */
?>
<div
	class="tribe-filter-bar-c-checkbox tribe-common-form-control-checkbox"
	data-js="tribe-filter-bar-c-checkbox"
>
	<input
		class="tribe-common-form-control-checkbox__input"
		id="<?php echo esc_attr( $id ); ?>"
		name="<?php echo esc_attr( $name ); ?>"
		type="checkbox"
		value="<?php echo esc_attr( $value ); ?>"
		<?php checked( $checked ); ?>
		data-js="tribe-filter-bar-c-checkbox-input"
	/>
	<label
		class="tribe-common-form-control-checkbox__label"
		for="<?php echo esc_attr( $id ); ?>"
	>
		<?php echo esc_html( $label ); ?>
	</label>
</div>

dropdown.php

<?php
/**
 * View: Dropdown Component
 *
 * Override this template in your own theme by creating a file at:
 * [your-theme]/tribe/events-filterbar/v2_1/components/dropdown.php
 *
 * See more documentation about our views templating system.
 *
 * @link http://evnt.is/1aiy
 *
 * @var string       $value   Value for the dropdown.
 * @var string       $id      ID of the dropdown.
 * @var string       $name    Name attribute for the dropdown.
 * @var array<array> $options Options for the dropdown.
 *
 * @version 5.0.0
 *
 */

/* Start Customizations */
if ( $name == 'tribe_eventcategory[]' ) { // You can use 'tribe_tags[]' for tags {
	
	// Unset unwanted categories
	foreach ( $options as $i => $category ) {
		// Prevent "undefined index" notice
		if ( ! isset( $category["text"] ) ) {
			return;
		}

		// Set your unwanted category names here
		if ( "Event Category 1" === $category['text'] ) {
			unset( $options[$i] );
		}
	}

	// Reindex the array
	$options = array_values( $options );
}
/* End Customizations */

$classes = [ 'tribe-filter-bar-c-dropdown' ];

foreach ( $options as $option ) {
	$term = get_term( $option['id'] );
}


if ( ! empty( $value ) ) {
	$classes[] = 'tribe-filter-bar-c-dropdown--has-selection';
}
?>
<div <?php tribe_classes( $classes ); ?>>
	<input
		class="tribe-filter-bar-c-dropdown__input"
		id="<?php echo esc_attr( $id ); ?>"
		data-js="tribe-filter-bar-c-dropdown-input"
		name="<?php echo esc_attr( $name ); ?>"
		type="hidden"
		value="<?php echo esc_attr( $value ); ?>"
		data-allow-html
		data-dropdown-css-width="false"
		data-options="<?php echo esc_attr( wp_json_encode( $options ) ); ?>"
		data-attach-container
		placeholder="<?php esc_attr_e( 'Select', 'tribe-events-filter-view' ); ?>"
		style="width: 100%;" <?php /* This is required for selectWoo styling to prevent select box overflow */ ?>
	/>
</div>