/**
 * Output the Create a Group button.
 *
 * @since BuddyPress (2.0.0)
 */
function bp_group_create_button()
{
    echo bp_get_group_create_button();
}

/**
 * Get the Create a Group nav item.
 *
 * @since 2.2.0
 *
 * @return string
 */
function bp_get_group_create_nav_item()
{
    // Get the create a group button.
    $create_group_button = bp_get_group_create_button();
    // Make sure the button is available.
    if (empty($create_group_button)) {
        return;
    }
    $output = '<li id="group-create-nav">' . $create_group_button . '</li>';
    /**
     * Filters the Create a Group nav item.
     *
     * @since 2.2.0
     *
     * @param string $output HTML output for nav item.
     */
    return apply_filters('bp_get_group_create_nav_item', $output);
}

/**
 * Get the Create a Group nav item.
 *
 * @since BuddyPress (2.2.0)
 *
 * @return string
 */
function bp_get_group_create_nav_item()
{
    // Get the create a group button
    $create_group_button = bp_get_group_create_button();
    // Make sure the button is available
    if (empty($create_group_button)) {
        return;
    }
    $output = '<li id="group-create-nav">' . $create_group_button . '</li>';
    return apply_filters('bp_get_group_create_nav_item', $output);
}

/**
 * Add the Create a Group button to the Groups directory title.
 *
 * bp-legacy puts the Create a Group button into the page title, to mimic
 * the behavior of bp-default.
 *
 * @since BuddyPress (2.0.0)
 * @todo Deprecate
 *
 * @param string $title Groups directory title.
 * @return string
 */
function bp_legacy_theme_group_create_button($title)
{
    return $title . ' ' . bp_get_group_create_button();
}

<?php

do_action('bp_before_directory_groups_page');
?>

<div id="buddypress">
    <header class="group-header page-header">
        <div id="item-statistics" class="follows">
            <h1 class="main-title"><?php 
buddyboss_page_title();
?>
</h1>

            <span class="create-a-group"><?php 
echo bp_get_group_create_button();
?>
</span>

            <div class="numbers">
                <span>
                    <p><?php 
echo groups_get_total_group_count();
?>
</p>
                    <p><?php 
_e('Groups', 'boss');
?>
</p>
                </span>
            </div>
        </div><!-- #item-statistics -->