A class that can can be used to have some default sections to King Composer for WordPress

class-kc-section-importer.php

<?php

if( class_exists( 'KC_Section_Importer' ) ) {
	return;
}

class KC_Section_Importer {
	/**
	 * Define the post_type & taxonomy to use
	 */
	public $taxonomy = 'kc-section-category';
	public $type = 'kc-section';
	
	/**
	 * Instance factory
	 */
	public static $_instance;
	
	public static function getInstance() {
		
		if( !( self::$_instance instanceof self ) ) {
			self::$_instance = new self;
		}
		
		return self::$_instance;
		
	}
	
	/**
	 * constructor
	 */
	public function __construct() {
	}
	
	/**
	 * the importer
	 */
	public function import() {
		
		if( !post_type_exists('kc-section') ) {
			return;
		}
		
		$template = require_once plugin_dir_path( __FILE__ ) . 'template.php';
		
		foreach( $template as $cat_name => $sections ) {
			
			$cat_slug = $this->makeslug( $cat_name );
			
			$term = get_term_by( 'slug', $cat_slug, $this->taxonomy );
			
			if( $term === false ) {
				$term = wp_insert_term( $cat_name, $this->taxonomy, array(
					'slug' => $cat_slug,
				) );
				$term_id = $term['term_id'];
			} else {
				$term_id = (int)$term->term_id;
			}
			
			foreach( $sections as $section ) {
				
				$section_name = $section['title'];
				
				$post = get_page_by_title( $section_name, 'OBJECT', $this->type );
				
				if( is_null( $post ) ) {
					
					$post = array(
						'post_title'   => $section_name,
						'post_content' => $section['content'],
						'post_status'  => 'publish',
						'post_type'    => $this->type,
						'tax_input'    => array(
							$this->taxonomy => array( $term_id ),
						),
						'meta_input'   => array(
							'kc_data' => array(
								'mode' => 'kc',
								'classes' => '',
								'max_width' => '',
								'thumbnail' => esc_url( $section['thumbnail'] ),
								'css' => '',
							),
						),
					);
					
					$id = wp_insert_post( $post );
					
				}
				
			}
			
		}
		
	}
	
	/**
	 * Converts a text to slug
	 */
	public static function makeslug( $text ) {
		
		$text = preg_replace( '~[^\pL\d]+~u', '-', $text );
		if( function_exists( 'iconv' ) ) {
			$text = iconv( 'utf-8', 'us-ascii//TRANSLIT', $text );
		}
		$text = preg_replace( '~[^-\w]+~', '', $text );
		$text = trim( $text, '-' );
		$text = preg_replace( '~-+~', '-', $text );
		$text = strtolower( $text );

		return $text;
	}
	
}

init.php

<?php
/**
 * The function is hooked on admin_init
 *
 * That means these sections cannot be removed. If someone deletes any of these sections, they will be added automatically again
 *
 * You can modify them to run at activation only
 */

add_action( 'admin_init', 'myplugin_add_sections' );

function myplugin_add_sections() {
		
    require_once plugin_dir_path( __FILE__ ) . 'class-kc-section-importer.php';

    $importer = KC_Section_Importer::init();
    $importer->import();

    return;

}

template.php

<?php
/**
 * This file should return array of sections
 */

return array(
  // array of category
	'My Category' => array(
		array(
			'title' => __( 'Hero section', 'textdomain' ), // Title
			'thumbnail' => plugin_dir_url( __FILE__ ) . 'thumbs/hero.jpg', // Thumbnail file
			'content' => '[kc_row _id="923527" use_container="no"][my_hero_section][/kc_column][/kc_row]', // the content of section
		),
    // .. more section
	),
  // .. more categories
);

Yeah! Awesome Sohan,

Welcome you to KingComposer page builder world